LAN8650/1

Description
Conformity
1 Preface
2 Introduction
3 Pin Descriptions and Assignments
4 Global Functional Descriptions
5 Serial Peripheral Interface (SPI)
6 Ethernet MAC
7 Integrated PHY
8 Application Information
9 Operational Characteristics
10 Packaging Information
11 Register Descriptions
- 11.1 Open Alliance 10BASE-T1x MAC-PHY Standard Registers
- 11.2 MAC Registers
- 11.3 PHY PCS Registers
- 11.4 PHY PMA/PMD Registers
- 11.5 PHY Vendor Specific Registers
  - 11.5.1 Control 1 Register
    Control 1 Register
  - 11.5.2 Status 1 Register
    Status 1 Register
  - 11.5.3 Status 2 Register
    Status 2 Register
  - 11.5.4 Status 3 Register
    Status 3 Register
  - 11.5.5 Interrupt Mask 1 Register
    Interrupt Mask 1 Register
  - 11.5.6 Interrupt Mask 2 Register
    Interrupt Mask 2 Register
  - 11.5.7 Counter Control Register
    Counter Control Register
  - 11.5.8 Transmit Opportunity Count (High)
    Transmit Opportunity Count (High)
  - 11.5.9 Transmit Opportunity Count (Low)
    Transmit Opportunity Count (Low)
  - 11.5.10 BEACON Count (High)
    BEACON Count (High)
  - 11.5.11 BEACON Count (Low)
    BEACON Count (Low)
  - 11.5.12 PLCA Multiple ID 0 Register
    PLCA Multiple ID 0 Register
  - 11.5.13 PLCA Multiple ID 1 Register
    PLCA Multiple ID 1 Register
  - 11.5.14 PLCA Multiple ID 2 Register
    PLCA Multiple ID 2 Register
  - 11.5.15 PLCA Multiple ID 3 Register
    PLCA Multiple ID 3 Register
  - 11.5.16 PLCA Reconciliation Sublayer Status
    PLCA Reconciliation Sublayer Status
  - 11.5.17 Port Management 2
    Port Management 2
  - 11.5.18 Inactivity Watchdog Timeout (High)
    Inactivity Watchdog Timeout (High)
  - 11.5.19 Inactivity Watchdog Timeout (Low)
    Inactivity Watchdog Timeout (Low)
  - 11.5.20 Transmit Match Control Register
    Transmit Match Control Register
  - 11.5.21 Transmit Match Pattern (High) Register
    Transmit Match Pattern (High) Register
  - 11.5.22 Transmit Match Pattern (Low) Register
    Transmit Match Pattern (Low) Register
  - 11.5.23 Transmit Match Mask (High) Register
    Transmit Match Mask (High) Register
  - 11.5.24 Transmit Match Mask (Low) Register
    Transmit Match Mask (Low) Register
  - 11.5.25 Transmit Match Location Register
    Transmit Match Location Register
  - 11.5.26 Transmit Matched Packet Delay Register
    Transmit Matched Packet Delay Register
  - 11.5.27 Receive Match Control Register
    Receive Match Control Register
  - 11.5.28 Receive Match Pattern (High) Register
    Receive Match Pattern (High) Register
  - 11.5.29 Receive Match Pattern (Low) Register
    Receive Match Pattern (Low) Register
  - 11.5.30 Receive Match Mask (High) Register
    Receive Match Mask (High) Register
  - 11.5.31 Receive Match Mask (Low) Register
    Receive Match Mask (Low) Register
  - 11.5.32 Receive Match Location Register
    Receive Match Location Register
  - 11.5.33 Receive Matched Packet Delay Register
    Receive Matched Packet Delay Register
  - 11.5.34 Credit Based Shaper Stop Threshold (High) Register
    Credit Based Shaper Stop Threshold (High) Register
  - 11.5.35 Credit Based Shaper Stop Threshold (Low) Register
    Credit Based Shaper Stop Threshold (Low) Register
  - 11.5.36 Credit Based Shaper Start Threshold (High) Register
    Credit Based Shaper Start Threshold (High) Register
  - 11.5.37 Credit Based Shaper Start Threshold (Low) Register
    Credit Based Shaper Start Threshold (Low) Register
  - 11.5.38 Credit Based Shaper Slope Control Register
    Credit Based Shaper Slope Control Register
  - 11.5.39 Credit Based Shaper Top Limit (High) Register
    Credit Based Shaper Top Limit (High) Register
  - 11.5.40 Credit Based Shaper Top Limit (Low) Register
    Credit Based Shaper Top Limit (Low) Register
  - 11.5.41 Credit Based Shaper Bottom Limit (High) Register
    Credit Based Shaper Bottom Limit (High) Register
  - 11.5.42 Credit Based Shaper Bottom Limit (Low) Register
    Credit Based Shaper Bottom Limit (Low) Register
  - 11.5.43 Credit Based Shaper Credit Counter (High) Register
    Credit Based Shaper Credit Counter (High) Register
  - 11.5.44 Credit Based Shaper Credit Counter (Low) Register
    Credit Based Shaper Credit Counter (Low) Register
  - 11.5.45 Credit Based Shaper Control Register
    Credit Based Shaper Control Register
  - 11.5.46 PLCA Skip Control Register
    PLCA Skip Control Register
  - 11.5.47 PLCA Transmit Opportunity Skip Register
    PLCA Transmit Opportunity Skip Register
  - 11.5.48 Application Controlled Media Access Control Register
    Application Controlled Media Access Control Register
  - 11.5.49 Sleep Control 0 Register
    Sleep Control 0 Register
  - 11.5.50 Sleep Control 1 Register
    Sleep Control 1 Register
  - 11.5.51 Collision Detector Control 0 Register
    Collision Detector Control 0 Register
  - 11.5.52 SQI Control Register
    SQI Control Register
  - 11.5.53 SQI Status 0 Register
    SQI Status 0 Register
  - 11.5.54 SQI Configuration 0 Register
    SQI Configuration 0 Register
  - 11.5.55 SQI Configuration 2 Register
    SQI Configuration 2 Register
  - 11.5.56 Analog Control 5
    Analog Control 5
  - 11.5.57 OPEN Alliance Map ID and Version Register
    OPEN Alliance Map ID and Version Register
  - 11.5.58 PLCA Control 0 Register
    PLCA Control 0 Register
  - 11.5.59 PLCA Control 1 Register
    PLCA Control 1 Register
  - 11.5.60 PLCA Status Register
    PLCA Status Register
  - 11.5.61 PLCA Transmit Opportunity Timer Register
    PLCA Transmit Opportunity Timer Register
  - 11.5.62 PLCA Burst Mode Register
    PLCA Burst Mode Register
- 11.6 Miscellaneous Register Descriptions
Data Sheet Revision History
Microchip Information

11.5.9 Transmit Opportunity Count (Low)

Name:	TOCNTL
Address:	0x0025


Bit	15	14	13	12	11	10	9	8
	TOCNT[15:8]
Access	RC	RC	RC	RC	RC	RC	RC	RC
Reset	0	0	0	0	0	0	0	0


Bit	7	6	5	4	3	2	1	0
	TOCNT[7:0]
Access	RC	RC	RC	RC	RC	RC	RC	RC
Reset	0	0	0	0	0	0	0	0

Bits 15:0 – TOCNT[15:0] Transmit Opportunity Count

This field maintains the lower 16 bits of the 32-bit count of the number of PLCA transmit opportunities the device may have utilized since the previous read.

Note: The contents of this register will be latched upon reading of the Transmit Opportunity Count (High) register.