User manual

PICkit™ Serial Analyzer User’s Guide
DS51647A-page 84 © 2007 Microchip Technology Inc.
TABLE 9-17: I
2
CM STATUS BLOCK
The I
2
CM TAG/CCMND bytes are used by the host (software) to describe an I
2
C trans-
action in ‘script’ form. The script is sent via USB to the script buffer (CBUF1) and inter-
preted by the COMM controller to execute the transaction on the I
2
C bus. The return
data stream contains I
2
C read data as well as ‘event marker’ TAGs that mark the
occurrence of each entity of the I
2
C transaction (e.g., TAG: 0x81 indicates a “Start” bit).
Byte Bit Description
COMM: I
2
CM
12 7:0 Bit flags: error status
0 WCOL error
1 SSPOV error
2
3
4
5
6
7 Composite error
13 7:0 Bit flags: info status
0
1
2
3
4
5
6
7
14 7:0
15 7:0
16 7:0
17 7:0
18 7:0
19 7:0 BIT RATE CODE currently in use