Texas Instruments UCD3138 Technical Reference Manual page 394

PMBus Interface Registers Reference
Table 10-13. PMBus Control Register 3 (PMBCTRL3) Register Field Descriptions (continued)
Bit Field
16 SCL_VALUE
15 SCL_MODE
14 SDA_DIR
13 SDA_VALUE
12 SDA_MODE
11 CNTL_DIR
10 CNTL_VALUE
9 CNTL_MODE
8 ALERT_DIR
7 ALERT_VALUE
6 ALERT_MODE
5 CNTL_INT_EDGE
4 FAST_MODE
_PLUS
3 FAST_MODE
2 BUS_LO_INT
_EDGE
1 ALERT_EN
394
PMBus Interface/I2C Interface
Type Reset
R/W 0
Configures output value of PMBus clock pin in GPIO Mode
0 = PMBus clock pin driven low in GPIO Mode (Default)
1 = PMBus clock pin driven high in GPIO Mode
R/W 0
Configures mode of PMBus Clock pin
0 = PMBus clock pin configured in functional mode (Default)
1 = PMBus clock pin configured as GPIO
R/W 0
Configures direction of PMBus data pin in GPIO mode
0 = PMBus data pin configured as output (Default)
1 = PMBus data pin configured as input
R/W 0
Configures output value of PMBus data pin in GPIO Mode
0 = PMBus data pin driven low in GPIO Mode (Default)
1 = PMBus data pin driven high in GPIO Mode
R/W 0
Configures mode of PMBus Data pin
0 = PMBus data pin configured in functional mode (Default)
1 = PMBus data pin configured as GPIO
R/W 0
Configures direction of Control pin in GPIO mode
0 = Control pin configured as output (Default)
1 = Control pin configured as input
R/W 0
Configures output value of Control pin in GPIO Mode
0 = Control pin driven low in GPIO Mode (Default)
1 = Control pin driven high in GPIO Mode
R/W 0
Configures mode of Control pin
0 = Control pin configured in functional mode (Default)
1 = Control pin configured as GPIO
R/W 0
Configures direction of Alert pin in GPIO mode
0 = Control pin configured as output (Default)
1 = Control pin configured as input
R/W 0
Configures output value of Alert pin in GPIO Mode
0 = Alert pin driven low in GPIO Mode (Default)
1 = Alert pin driven high in GPIO Mode
R/W 0
Configures mode of Alert pin
0 = Alert pin configured in functional mode (Default)
1 = Aler3 pin configured as GPIO
R/W 0
Control Interrupt Edge Select
0 = Interrupt generated on falling edge of Control (Default)
1 = Interrupt generated on rising edge of Control
R/W 0
Fast Mode Plus Enable
0 = Standard 100 KHz mode enabled (Default)
1 = Fast Mode Plus enabled (1MHz operation on PMBus)
R/W 0
Fast Mode Enable
0 = Standard 100 KHz mode enabled (Default)
1 = Fast Mode enabled (400KHz operation on PMBus)
R/W 0
Clock Low Timeout Interrupt Edge Select
0 = Interrupt generated on rising edge of clock low timeout (Default)
1 = Interrupt generated on falling edge of clock low timeout
R/W 0
Slave Alert Enable
0 = PMBus Alert is not driven by slave, pulled up high on PMBus (Default)
1 = PMBus Alert driven low by slave
Copyright © 2016, Texas Instruments Incorporated
Description
SNIU028A – February 2016 – Revised April 2016
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