TMP139AIYAHR datasheet(18/58 Pages) TI

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Table 7-5. Command Truth Table - PEC Enabled Mode

CMD

Command Name

Command Description

000

W1R

Write 1 Byte to Register address specified in

data packet

R1R

Read 1 Byte from Register address specified

in data packet

001

W2R

Write 2 Bytes to Register address specified in

data packet

R2R

Read 2 Bytes from Register address

specified in data packet

010 – 111

RSVD

Reserved

If the CMD value sent by the host is not valid for TMP139, the device shall not write any data to the register

specified.

S or Sr

HID2

HID1

HID0

R/W=0

RA = Register Address [7:0]

ACK/NACK

CMD

Data(RA)

...

Data(RA+N)

W=0

PEC

Sr or P

Figure 7-13. I3C Basic Mode Write with PEC enabled

HID2

HID1

HID0

R/W=0

RA = Register Address [7:0]

ACK/NACK

CMD

Data(RA)

...

Dat a(RA+N)

W=0

PEC

Sr or P

R/W=0

ACK

Figure 7-14. I3C Basic Mode Write with IBI Header and PEC enabled

If there is a parity error during the data transfer, the device shall discard all the bytes including the byte for which

parity error was detected and set the parity error condition. If the host attempts to start a new transaction with a

Repeated Start to the same device, then TMP139 shall NACK the device address to indicate an error condition

to the host. The host must first clear the parity error condition before performing any new transfer to the

TMP139.

If there is a PEC error, then the TMP139 shall discard the entire data packet and set the PEC error condition. If

the host attempts to start a new transaction with a Repeated Start to the same device, then TMP139 shall NACK

the device address to indicate an error condition to the host. The host must first clear the PEC error condition

before performing any new transfer to the TMP139.

TMP139

SNIS217 – DECEMBER 2020

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