SNIS217C december 2020 – may 2023 TMP139
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The DEVCAP CCC is issued by the host controller to the TMP139, to get the optional device capabilities that are supported as given in Table 7-7.
The command is issued only in direct mode as shown in Figure 7-38, when PEC is disabled, and in Figure 7-39, when PEC is enabled. In the latter case the host controller shall append the PEC byte calculated on all bytes except the byte with 7'h7E and R/W=0 after the Start or Repeated Start. The TMP139 calculates the PEC on the data bytes that are sent to the host.
Bit | Value | Comments |
---|---|---|
DEVCAP_MSB[7:3] | 00000 | Reserved |
DEVCAP_MSB[2] | 1 | 0 = No support for Timer Based Reset 1 = Timer Based Reset supported |
DEVCAP_MSB[1:0] | 00 | Reserved |
DEVCAP_LSB[7:0] | 8'h00 | Reserved |
TMP139 NACKs the DEVCAP CCC if the previous transaction has a parity or PEC error and the host starts the transaction with a Repeated Start.