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
- 3.4 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

3.3.3 UDDRC Mode Register Read/Write Control Register 0

Name:	UDDRC_MRCTRL0
Offset:	0x010
Reset:	0x00000010
Property:	R/W


Bit	31	30	29	28	27	26	25	24
	MR_WR
Access	R/W
Reset	0


Bit	23	22	21	20	19	18	17	16

Access
Reset


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


Bit	7	6	5	4	3	2	1	0
				MR_RANK				MR_TYPE
Access				R/W				R/W
Reset				1				0

Bit 31 – MR_WR

Setting this register bit to 1 triggers a mode register read or write operation. When the MR operation is complete, the UDDRC automatically clears this bit.

The other register fields of this register must be written in a separate APB transaction, before setting this mr_wr bit. It is recommended NOT to set this signal if in Init, Deep Power-down or MPSM operating modes.

Programming mode: Dynamic

Bits 15:12 – MR_ADDR[3:0] Address of the Mode register that is to be written to.

Don't Care for LPDDR2/LPDDR3 (see UDDRC_MRCTRL1.MR_DATA for mode register addressing in LPDDR2/LPDDR3).

This signal is also used for writing to control words of the register chip on RDIMMs/LRDIMMs. In that case, it corresponds to the bank address bits sent to the RDIMM/LRDIMM.

Programming mode: Dynamic

Value	Description
0000	MR0
0001	MR1
0010	MR2
0011	MR3
0100	MR4
0101	MR5
0110	MR6
0111	MR7

Bit 4 – MR_RANK

Controls which rank is accessed by MRCTRL0.mr_wr. Normally, it is desired to access all ranks, so all bits should be set to 1. However, for multi-rank UDIMMs/RDIMMs/LRDIMMs which implement address mirroring, it may be necessary to access ranks individually.

Examples (assume UDDRC is configured for 4 ranks):

Programming mode: Dynamic

Value	Description
0x1	Select rank 0 only
0x2	Select rank 1 only
0x5	Select ranks 0 and 2
0xA	Select ranks 1 and 3
0xF	Select ranks 0, 1, 2 and 3

Bit 0 – MR_TYPE

Indicates whether the Mode register operation is read or write. Only used for LPDDR2/LPDDR3.

Programming mode: Dynamic

Value	Description
0	Write
1	Read

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.