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TMP139AIYAHT Datasheet(PDF) 27 Page - Texas Instruments |
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TMP139AIYAHT Datasheet(HTML) 27 Page - Texas Instruments |
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27 / 58 page  0x29 T Sr or P S or Sr 1 1 1 1 1 1 0 ACK R/W=0 Figure 7-35. SETAASA CCC Note TMP139 NACKs the SETAASA CCC if the previous CCC transaction has a parity error and the host starts the transaction with a Repeated Start. 7.4.6.5 GETSTATUS CCC The GETSTATUS CCC is issued by the host controller to the TMP139 to get the status of any pending parity error, PEC error, or interrupt event. Once the GETSTATUS is received, the TMP139 shall not clear the status and host must issue additional transactions on the bus to clear the status flags individually or by writing 1'b1 to the MR27 register CLR_GLOBAL bit. The command is issued only in direct mode as shown in Figure 7-36, when PEC is disabled, and in Figure 7-37, 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. 0x90 T T=1 S or Sr 1 1 1 1 1 1 0 ACK/NACK R/W=0 Sr 0 SA 1 0 HID2 HID1 HID0 ACK/NACK R/W=1 PEC_Err 0 0 0 0 0 0 0 Sr or P T=0 0 0 P_Err 0 PENDIN G INTERRUPT Figure 7-36. GETSTATUS CCC Direct 0x90 T T=1 S or Sr 1 1 1 1 1 1 0 ACK/NACK R/W=0 Sr 0 SA 1 0 HID2 HID1 HID0 ACK/NACK R/W=1 PEC_Err 0 0 0 0 0 0 0 Sr or P T=0 0 0 P_Err 0 PENDIN G INTERRUPT PEC T PEC T=1 Figure 7-37. GETSTATUS CCC Direct with PEC Enabled Note TMP139 NACKs the GETSTATUS CCC if the previous transaction has a parity or PEC error and the host starts the transaction with a Repeated Start. 7.4.6.6 DEVCAP CCC 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 www.ti.com TMP139 SNIS217 – DECEMBER 2020 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 27 Product Folder Links: TMP139 |
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