Pmbus Status Register (Pmbst); Pmbus Status Register (Pmbst) Register Field Descriptions - Texas Instruments UCD3138 Technical Reference Manual

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10.10.5 PMBus Status Register (PMBST)

Address FFF7F610
21
SCL_RAW SDA_RAW
R-0
15 14
MASTER LOST_ARB
R-0 R-0
7 6
PEC_VALID NACK
R-0 R-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 10-9. PMBus Status Register (PMBST) Register Field Descriptions
Bit Field
21 SCL_RAW
20 SDA_RAW
19 CONTROL_RAW
18 ALERT_RAW
17 CONTROL_EDGE
16 ALERT_EDGE
15 MASTER
14 LOST_ARB
13 BUS_FREE
12 UNIT_BUSY
11 RPT_START
SNIU028A – February 2016 – Revised April 2016
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Figure 10-57. PMBus Status Register (PMBST)
20 19
CONTROL_RAW
R-0 R-0
13 12
BUS_FREE UNIT_BUSY
R-0 R-0
5 4
EOM DATA_
REQUEST
R-0 R-0
Type Reset
R 0
PMBus Clock Pin Real Time Status
0 = PMBus clock pin observed at logic level low
1 = PMBus clock pin observed at logic level high
R 0
PMBus Data Pin Real Time Status
0 = PMBus data pin observed at logic level low
1 = PMBus data pin observed at logic level high
R 0
Control Pin Real Time Status
0 = Control pin observed at logic level low
1 = Control pin observed at logic level high
R 0
Alert Pin Real Time Status
0 = Alert pin observed at logic level low
1 = Alert pin observed at logic level high
R 0
Control Edge Detection Status
0 = Control pin has not transitioned
1 = Control pin has been asserted by another device on PMBus
R 0
Alert Edge Detection Status
0 = Alert pin has not transitioned
1 = Alert pin has been asserted by another device on PMBus
R 0
Master Indicator
0 = PMBus Interface in Slave Mode or Idle Mode
1 = PMBus Interface in Master Mode
R 0
Lost Arbitration Flag
0 = Master has attained control of PMBus
1 = Master has lost arbitration and control of PMBus
R 0
PMBus Free Indicator
0 = PMBus processing current message
1 = PMBus available for new message
R 0
PMBus Busy Indicator
0 = PMBus Interface is idle, ready to transmit/receive message
1 = PMBus Interface is busy, processing current message
R 0
Repeated Start Flag
0 = No Repeated Start received by interface
1 = Repeated Start condition received by interface
Copyright © 2016, Texas Instruments Incorporated
PMBus Interface Registers Reference
18
ALERT_RAW CONTROL_EDGE
R-0
11 10
RPT_START SLAVE_ADDR
_READY
R-0 R-0
3 2
DATA_READY
R-0
Description
PMBus Interface/I2C Interface
17 16
ALERT_EDGE
R-0 R-0
9 8
CLK_HIGH_ CLK_LOW_
DETECTED TIMEOUT
R-0 R-0
1 0
RD_BYTE_COUNT
R-0
387