5.6 Device ID And Revision Register

The upper byte of this register is used to specify the device identification and the lower byte is used to specify the device revision. The Device ID for the MCP9808 is 0x04 (hex).

The revision begins with 0x00 (hex) for the first release, with the number being incremented as revised versions are released. 

Table 5-7. Device ID And Device Revision – Read-only (→ Address ‘0000 0111’b)
R-0R-0R-0R-0R-0R-1R-0R-0
Device ID
bit 15bit 8
R-0R-0R-0R-0R-0R-0R-0R-0
Device Revision
bit 7bit 0
R = Readable bitW = Writable bitU = Unimplemented bit, read as ‘0’
-n = Value at POR‘1’ = Bit is set‘0’ = Bit is clearedx = Bit is unknown
15-8Device ID: Bit 15 to bit 8 are used for device ID
7-0Device Revision: Bit 7 to bit 0 are used for device revision
Figure 5-7. Timing Diagram for Reading Device ID and Device Revision Register (see Serial Communication).