Introduction
Reference Document
1 Overview
2 CPU and Interconnect
3 Memories
- 3.1 Overview
- 3.2 Static Memory Controller (SMC)
- 3.3 Universal DDR Memory Controller (UDDRC)
  - 3.3.1 Description
  - 3.3.2 Embedded Characteristics
  - 3.3.3 Block Diagram
  - 3.3.4 I/O Lines Description
  - 3.3.5 Functional Description
  - 3.3 Register Summary
    - 3.3.1 UDDRC Host Register 0
      UDDRC Host Register 0
    - 3.3.2 UDDRC Operating Mode Status Register
      UDDRC Operating Mode Status Register
    - 3.3.3 UDDRC Mode Register Read/Write Control Register 0
      UDDRC Mode Register Read/Write Control Register 0
    - 3.3.4 UDDRC Mode Register Read/Write Control Register 1
      UDDRC Mode Register Read/Write Control Register 1
    - 3.3.5 UDDRC Mode Register Read/Write Status Register
      UDDRC Mode Register Read/Write Status Register
    - 3.3.6 UDDRC Temperature Derate Enable Register
      UDDRC Temperature Derate Enable Register
    - 3.3.7 UDDRC Temperature Derate Interval Register
      UDDRC Temperature Derate Interval Register
    - 3.3.8 UDDRC Temperature Derate Control Register
      UDDRC Temperature Derate Control Register
    - 3.3.9 UDDRC Low Power Control Register
      UDDRC Low Power Control Register
    - 3.3.10 UDDRC Low Power Timing Register
      UDDRC Low Power Timing Register
    - 3.3.11 UDDRC Hardware Low Power Control Register
      UDDRC Hardware Low Power Control Register
    - 3.3.12 UDDRC Refresh Control Register 0
      UDDRC Refresh Control Register 0
    - 3.3.13 UDDRC Refresh Control Register 3
      UDDRC Refresh Control Register 3
    - 3.3.14 UDDRC Refresh Timing Register
      UDDRC Refresh Timing Register
    - 3.3.15 UDDRC CRC Parity Control Register 0
      UDDRC CRC Parity Control Register 0
    - 3.3.16 UDDRC CRC Parity Status Register
      UDDRC CRC Parity Status Register
    - 3.3.17 UDDRC SDRAM Initialization Register 0
      UDDRC SDRAM Initialization Register 0
    - 3.3.18 UDDRC SDRAM Initialization Register 1
      UDDRC SDRAM Initialization Register 1
    - 3.3.19 UDDRC SDRAM Initialization Register 2
      UDDRC SDRAM Initialization Register 2
    - 3.3.20 UDDRC SDRAM Initialization Register 3
      UDDRC SDRAM Initialization Register 3
    - 3.3.21 UDDRC SDRAM Initialization Register 4
      UDDRC SDRAM Initialization Register 4
    - 3.3.22 UDDRC SDRAM Initialization Register 5
      UDDRC SDRAM Initialization Register 5
    - 3.3.23 UDDRC DIMM Control Register
      UDDRC DIMM Control Register
    - 3.3.24 UDDRC SDRAM Timing Register 0
      UDDRC SDRAM Timing Register 0
    - 3.3.25 UDDRC SDRAM Timing Register 1
      UDDRC SDRAM Timing Register 1
    - 3.3.26 UDDRC SDRAM Timing Register 2
      UDDRC SDRAM Timing Register 2
    - 3.3.27 UDDRC SDRAM Timing Register 3
      UDDRC SDRAM Timing Register 3
    - 3.3.28 UDDRC SDRAM Timing Register 4
      UDDRC SDRAM Timing Register 4
    - 3.3.29 UDDRC SDRAM Timing Register 5
      UDDRC SDRAM Timing Register 5
    - 3.3.30 UDDRC SDRAM Timing Register 6
      UDDRC SDRAM Timing Register 6
    - 3.3.31 UDDRC SDRAM Timing Register 7
      UDDRC SDRAM Timing Register 7
    - 3.3.32 UDDRC SDRAM Timing Register 8
      UDDRC SDRAM Timing Register 8
    - 3.3.33 UDDRC SDRAM Timing Register 14
      UDDRC SDRAM Timing Register 14
    - 3.3.34 UDDRC SDRAM Timing Register 15
      UDDRC SDRAM Timing Register 15
    - 3.3.35 UDDRC ZQ Control Register 0
      UDDRC ZQ Control Register 0
    - 3.3.36 UDDRC ZQ Control Register 1
      UDDRC ZQ Control Register 1
    - 3.3.37 UDDRC ZQ Control Register 2
      UDDRC ZQ Control Register 2
    - 3.3.38 UDDRC ZQ Status Register
      UDDRC ZQ Status Register
    - 3.3.39 UDDRC DFI Timing Register 0
      UDDRC DFI Timing Register 0
    - 3.3.40 UDDRC DFI Timing Register 1
      UDDRC DFI Timing Register 1
    - 3.3.41 UDDRC DFI Low Power Configuration Register 0
      UDDRC DFI Low Power Configuration Register 0
    - 3.3.42 UDDRC DFI Update Register 0
      UDDRC DFI Update Register 0
    - 3.3.43 UDDRC DFI Update Register 1
      UDDRC DFI Update Register 1
    - 3.3.44 UDDRC DFI Update Register 2
      UDDRC DFI Update Register 2
    - 3.3.45 UDDRC DFI Miscellaneous Control Register
      UDDRC DFI Miscellaneous Control Register
    - 3.3.46 UDDRC DFI Status Register
      UDDRC DFI Status Register
    - 3.3.47 UDDRC DFI PHY Host
      UDDRC DFI PHY Host
    - 3.3.48 UDDRC Address Map Register 1
      UDDRC Address Map Register 1
    - 3.3.49 UDDRC Address Map Register 2
      UDDRC Address Map Register 2
    - 3.3.50 UDDRC Address Map Register 3
      UDDRC Address Map Register 3
    - 3.3.51 UDDRC Address Map Register 4
      UDDRC Address Map Register 4
    - 3.3.52 UDDRC Address Map Register 5
      UDDRC Address Map Register 5
    - 3.3.53 UDDRC Address Map Register 6
      UDDRC Address Map Register 6
    - 3.3.54 UDDRC Address Map Register 9
      UDDRC Address Map Register 9
    - 3.3.55 UDDRC Address Map Register 10
      UDDRC Address Map Register 10
    - 3.3.56 UDDRC Address Map Register 11
      UDDRC Address Map Register 11
    - 3.3.57 UDDRC ODT Configuration Register
      UDDRC ODT Configuration Register
    - 3.3.58 UDDRC ODT/Rank Map Register
      UDDRC ODT/Rank Map Register
    - 3.3.59 UDDRC Scheduler Control Register 0
      UDDRC Scheduler Control Register 0
    - 3.3.60 UDDRC Scheduler Control Register 1
      UDDRC Scheduler Control Register 1
    - 3.3.61 UDDRC High Priority Read CAM Register 1
      UDDRC High Priority Read CAM Register 1
    - 3.3.62 UDDRC Low Priority Read CAM Register 1
      UDDRC Low Priority Read CAM Register 1
    - 3.3.63 UDDRC Write CAM Register 1
      UDDRC Write CAM Register 1
    - 3.3.64 UDDRC Debug Register 0
      UDDRC Debug Register 0
    - 3.3.65 UDDRC Debug Register 1
      UDDRC Debug Register 1
    - 3.3.66 UDDRC CAM Debug Register
      UDDRC CAM Debug Register
    - 3.3.67 UDDRC Command Debug Register
      UDDRC Command Debug Register
    - 3.3.68 UDDRC Status Debug Register
      UDDRC Status Debug Register
    - 3.3.69 UDDRC Software Register Programming Control Enable
      UDDRC Software Register Programming Control Enable
    - 3.3.70 UDDRC Software Register Programming Control Status
      UDDRC Software Register Programming Control Status
    - 3.3.71 UDDRC AXI Poison Configuration Register. Common for all AXI ports
      UDDRC AXI Poison Configuration Register. Common for all AXI ports
    - 3.3.72 UDDRC AXI Poison Status Register
      UDDRC AXI Poison Status Register
    - 3.3.73 UDDRC Temperature Derate Status Register
      UDDRC Temperature Derate Status Register
    - 3.3.74 UDDRC Port Status Register
      UDDRC Port Status Register
    - 3.3.75 UDDRC Port Common Configuration Register
      UDDRC Port Common Configuration Register
    - 3.3.76 UDDRC AXI Port 0 Configuration Read Register
      UDDRC AXI Port 0 Configuration Read Register
    - 3.3.77 UDDRC AXI Port 0 Configuration Write Register
      UDDRC AXI Port 0 Configuration Write Register
    - 3.3.78 UDDRC AXI Port 0 Control Register
      UDDRC AXI Port 0 Control Register
    - 3.3.79 UDDRC AXI Port 0 Read QoS Configuration Register 0
      UDDRC AXI Port 0 Read QoS Configuration Register 0
    - 3.3.80 UDDRC AXI Port 0 Read QoS Configuration Register 1
      UDDRC AXI Port 0 Read QoS Configuration Register 1
    - 3.3.81 UDDRC AXI Port 0 Write QoS Configuration Register 0
      UDDRC AXI Port 0 Write QoS Configuration Register 0
    - 3.3.82 UDDRC AXI Port 0 Write QoS Configuration Register 1
      UDDRC AXI Port 0 Write QoS Configuration Register 1
    - 3.3.83 UDDRC AXI Port 1 Configuration Read Register
      UDDRC AXI Port 1 Configuration Read Register
    - 3.3.84 UDDRC AXI Port 1 Configuration Write Register
      UDDRC AXI Port 1 Configuration Write Register
    - 3.3.85 UDDRC AXI Port 1 Control Register
      UDDRC AXI Port 1 Control Register
    - 3.3.86 UDDRC AXI Port 1 Read QoS Configuration Register 0
      UDDRC AXI Port 1 Read QoS Configuration Register 0
    - 3.3.87 UDDRC AXI Port 1 Read QoS Configuration Register 1
      UDDRC AXI Port 1 Read QoS Configuration Register 1
    - 3.3.88 UDDRC AXI Port 1 Write QoS Configuration Register 0
      UDDRC AXI Port 1 Write QoS Configuration Register 0
    - 3.3.89 UDDRC AXI Port 1 Write QoS Configuration Register 1
      UDDRC AXI Port 1 Write QoS Configuration Register 1
    - 3.3.90 UDDRC AXI Port 2 Configuration Read Register
      UDDRC AXI Port 2 Configuration Read Register
    - 3.3.91 UDDRC AXI Port 2 Configuration Write Register
      UDDRC AXI Port 2 Configuration Write Register
    - 3.3.92 UDDRC AXI Port 2 Control Register
      UDDRC AXI Port 2 Control Register
    - 3.3.93 UDDRC AXI Port 2 Read QoS Configuration Register 0
      UDDRC AXI Port 2 Read QoS Configuration Register 0
    - 3.3.94 UDDRC AXI Port 2 Read QoS Configuration Register 1
      UDDRC AXI Port 2 Read QoS Configuration Register 1
    - 3.3.95 UDDRC AXI Port 2 Write QoS Configuration Register 0
      UDDRC AXI Port 2 Write QoS Configuration Register 0
    - 3.3.96 UDDRC AXI Port 2 Write QoS Configuration Register 1
      UDDRC AXI Port 2 Write QoS Configuration Register 1
    - 3.3.97 UDDRC AXI Port 3 Configuration Read Register
      UDDRC AXI Port 3 Configuration Read Register
    - 3.3.98 UDDRC AXI Port 3 Configuration Write Register
      UDDRC AXI Port 3 Configuration Write Register
    - 3.3.99 UDDRC AXI Port 3 Control Register
      UDDRC AXI Port 3 Control Register
    - 3.3.100 UDDRC AXI Port 3 Read QoS Configuration Register 0
      UDDRC AXI Port 3 Read QoS Configuration Register 0
    - 3.3.101 UDDRC AXI Port 3 Read QoS Configuration Register 1
      UDDRC AXI Port 3 Read QoS Configuration Register 1
    - 3.3.102 UDDRC AXI Port 3 Write QoS Configuration Register 0
      UDDRC AXI Port 3 Write QoS Configuration Register 0
    - 3.3.103 UDDRC AXI Port 3 Write QoS Configuration Register 1
      UDDRC AXI Port 3 Write QoS Configuration Register 1
    - 3.3.104 UDDRC AXI Port 4 Configuration Read Register
      UDDRC AXI Port 4 Configuration Read Register
    - 3.3.105 UDDRC AXI Port 4 Configuration Write Register
      UDDRC AXI Port 4 Configuration Write Register
    - 3.3.106 UDDRC AXI Port 4 Control Register
      UDDRC AXI Port 4 Control Register
    - 3.3.107 UDDRC AXI Port 4 Read QoS Configuration Register 0
      UDDRC AXI Port 4 Read QoS Configuration Register 0
    - 3.3.108 UDDRC AXI Port 4 Read QoS Configuration Register 1
      UDDRC AXI Port 4 Read QoS Configuration Register 1
    - 3.3.109 UDDRC AXI Port 4 Write QoS Configuration Register 0
      UDDRC AXI Port 4 Write QoS Configuration Register 0
    - 3.3.110 UDDRC AXI Port 4 Write QoS Configuration Register 1
      UDDRC AXI Port 4 Write QoS Configuration Register 1
    - 3.3.111 UDDRC SAR Base Address Register 0
      UDDRC SAR Base Address Register 0
    - 3.3.112 UDDRC SAR Size Register 0
      UDDRC SAR Size Register 0
    - 3.3.113 UDDRC FREQ1 Temperature Derate Enable Register
      UDDRC FREQ1 Temperature Derate Enable Register
    - 3.3.114 UDDRC FREQ1 Temperature Derate Interval Register
      UDDRC FREQ1 Temperature Derate Interval Register
    - 3.3.115 UDDRC FREQ1 Low Power Timing Register
      UDDRC FREQ1 Low Power Timing Register
    - 3.3.116 UDDRC FREQ1 Refresh Control Register 0
      UDDRC FREQ1 Refresh Control Register 0
    - 3.3.117 UDDRC FREQ1 Refresh Timing Register
      UDDRC FREQ1 Refresh Timing Register
    - 3.3.118 UDDRC FREQ1 SDRAM Initialization Register 3
      UDDRC FREQ1 SDRAM Initialization Register 3
    - 3.3.119 UDDRC FREQ1 SDRAM Initialization Register 4
      UDDRC FREQ1 SDRAM Initialization Register 4
    - 3.3.120 UDDRC FREQ1 SDRAM Timing Register 0
      UDDRC FREQ1 SDRAM Timing Register 0
    - 3.3.121 UDDRC FREQ1 SDRAM Timing Register 1
      UDDRC FREQ1 SDRAM Timing Register 1
    - 3.3.122 UDDRC FREQ1 SDRAM Timing Register 2
      UDDRC FREQ1 SDRAM Timing Register 2
    - 3.3.123 UDDRC FREQ1 SDRAM Timing Register 3
      UDDRC FREQ1 SDRAM Timing Register 3
    - 3.3.124 UDDRC FREQ1 SDRAM Timing Register 4
      UDDRC FREQ1 SDRAM Timing Register 4
    - 3.3.125 UDDRC FREQ1 SDRAM Timing Register 5
      UDDRC FREQ1 SDRAM Timing Register 5
    - 3.3.126 UDDRC FREQ1 SDRAM Timing Register 6
      UDDRC FREQ1 SDRAM Timing Register 6
    - 3.3.127 UDDRC FREQ1 SDRAM Timing Register 7
      UDDRC FREQ1 SDRAM Timing Register 7
    - 3.3.128 UDDRC FREQ1 SDRAM Timing Register 8
      UDDRC FREQ1 SDRAM Timing Register 8
    - 3.3.129 UDDRC FREQ1 SDRAM Timing Register 14
      UDDRC FREQ1 SDRAM Timing Register 14
    - 3.3.130 UDDRC FREQ1 SDRAM Timing Register 15
      UDDRC FREQ1 SDRAM Timing Register 15
    - 3.3.131 UDDRC FREQ1 ZQ Control Register 0
      UDDRC FREQ1 ZQ Control Register 0
    - 3.3.132 UDDRC FREQ1 DFI Timing Register 0
      UDDRC FREQ1 DFI Timing Register 0
    - 3.3.133 UDDRC FREQ1 DFI Timing Register 1
      UDDRC FREQ1 DFI Timing Register 1
    - 3.3.134 UDDRC FREQ1 ODT Configuration Register
      UDDRC FREQ1 ODT Configuration Register
- 3.4 DDR/LPDDR Physical Interface (DDR3PHY)
4 System Controller
5 Analog Subsystem
6 Image Subsystem
7 Audio Subsystem
8 Security and Cryptography Subsystem
9 Connectivity Subsystem
10 USB Subsystem
11 Electrical and Mechanical Characteristics
12 Glossary
13 Revision History
Microchip Information

3.3.57 UDDRC ODT Configuration Register

Name:	UDDRC_ODTCFG
Offset:	0x240
Reset:	0x04000400
Property:	Read/Write


Bit	31	30	29	28	27	26	25	24
					WR_ODT_HOLD[3:0]
Access					R/W	R/W	R/W	R/W
Reset					0	1	0	0


Bit	23	22	21	20	19	18	17	16
				WR_ODT_DELAY[4:0]
Access				R/W	R/W	R/W	R/W	R/W
Reset				0	0	0	0	0


Bit	15	14	13	12	11	10	9	8
					RD_ODT_HOLD[3:0]
Access					R/W	R/W	R/W	R/W
Reset					0	1	0	0


Bit	7	6	5	4	3	2	1	0
		RD_ODT_DELAY[4:0]
Access		R/W	R/W	R/W	R/W	R/W
Reset		0	0	0	0	0

Bits 27:24 – WR_ODT_HOLD[3:0]

DFI PHY clock cycles to hold ODT for a write command. The minimum supported value is 2.

Recommended values:

DDR2:

- BL8: 0x5 (DDR2-400/533/667), 0x6 (DDR2-800), 0x7 (DDR2-1066)

- BL4: 0x3 (DDR2-400/533/667), 0x4 (DDR2-800), 0x5 (DDR2-1066)

DDR3:

- BL8: 0x6

WR_PREAMBLE = 1 (1tCK write preamble), 2 (2tCK write preamble)

CRC_MODE = 0 (not CRC mode), 1 (CRC mode)

LPDDR3:

- BL8: 7 + RU(tODTon(max)/tCK)

Unit: DFI PHY clock cycles.

Programming Mode: Quasi-dynamic Group 1, Group 4

Bits 20:16 – WR_ODT_DELAY[4:0]

The delay, in DFI PHY clock cycles, from issuing a write command to setting ODT values associated with that command. ODT setting must remain constant for the entire time that DQS is driven by the UDDRC.

Recommended values:

DDR2:

- CWL + AL - 3 (DDR2-400/533/667), CWL + AL - 4 (DDR2-800), CWL + AL - 5 (DDR2-1066)

If (CWL + AL - 3 < 0), UDDRC does not support ODT for write operation.

DDR3:

- 0x0

LPDDR3:

- WL - 1 - RU(tODTon(max)/tCK))

Unit: DFI PHY clock cycles.

Programming Mode: Quasi-dynamic Group 1, Group 4

Bits 11:8 – RD_ODT_HOLD[3:0]

DFI PHY clock cycles to hold ODT for a read command. The minimum supported value is 2.

Recommended values:

DDR2:

- BL8: 0x6 (not DDR2-1066), 0x7 (DDR2-1066)

- BL4: 0x4 (not DDR2-1066), 0x5 (DDR2-1066)

DDR3:

- BL8 - 0x6

LPDDR3:

- BL8: 5 + RU(tDQSCK(max)/tCK) - RD(tDQSCK(min)/tCK) + RU(tODTon(max)/tCK)

Unit: DFI PHY clock cycles.

Programming Mode: Quasi-dynamic Group 1, Group 4

Bits 6:2 – RD_ODT_DELAY[4:0]

The delay, in DFI PHY clock cycles, from issuing a read command to setting ODT values associated with that command. ODT setting must remain constant for the entire time that DQS is driven by the UDDRC.

Recommended values:

DDR2:

- CL + AL - 4 (not DDR2-1066), CL + AL - 5 (DDR2-1066)

If (CL + AL - 4 < 0), UDDRC does not support ODT for read operation.

DDR3:

- CL - CWL

LPDDR3:

- RL + RD(tDQSCK(min)/tCK) - 1 - RU(tODTon(max)/tCK)

Unit: DFI PHY clock cycles.

Programming Mode: Quasi-dynamic Group 1, Group 4

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