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TMP139AIYAHT Datasheet(PDF) 29 Page - Texas Instruments |
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TMP139AIYAHT Datasheet(HTML) 29 Page - Texas Instruments |
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29 / 58 page  Note TMP139 NACKs the SETHID CCC if the previous transaction has a parity error and the host starts the transaction with a Repeated Start. 7.4.6.8 DEVCTRL CCC The DEVCTRL CCC is issued by the host controller for enable or disable operations that are common to devices on the bus and TMP139 shall recognize the DEVCTRL CCC. The command is generally issued in broadcast mode, but may be issued as unicast or multicast mode as well. The host may issue the DEVCTRL CCC as a generic access with RegMod field set as 0 or for a specific register access with RegMod set as 1. When RegMod field is set to 0, Figure 7-41 shows the DEVCTRL CCC packet structure when PEC is disabled. Figure 7-42 shows the structure of the DEVCTRL CCC when RegMod field is set to 0 and 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. 0x62 T S or Sr 1 1 1 1 1 1 0 ACK R/W=0 ADDRMASK [2] STOFF SET [1] PECBL[1] REGMOD = 0 T Sr or P ADDRMASK [1] ADDRMASK [0] PECBL[0] STOFF SET [0] DEV ADDR 0 T DEV CTRL DATA 0 T DEV CTRL DATA 1 T DEV CTRL DATA 2 T DEV CTRL DATA 3 T Figure 7-41. DEVCTRL CCC With REGMOD = 0 and PEC Disabled 0x62 T S or Sr 1 1 1 1 1 1 0 ACK R/W=0 ADDRMASK [2] STOFF SET [1] PECBL[1] REGMOD = 0 T ADDRMASK [1] ADDRMASK [0] PECBL[0] STOFF SET [0] DEV ADDR 0 T DEV CTRL DATA 0 T DEV CTRL DATA 1 T DEV CTRL DATA 2 T DEV CTRL DATA 3 T Sr or P PEC T Figure 7-42. DEVCTRL CCC With REGMOD = 0 and PEC Enabled When RegMod field is set to 1, Figure 7-43 shows the DEVCTRL CCC packet structure when PEC is disabled. Figure 7-44 shows the structure of the DEVCTRL CCC when RegMod field is set to 1 and 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 www.ti.com TMP139 SNIS217 – DECEMBER 2020 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 29 Product Folder Links: TMP139 |
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