PICkit? Serial Analyzer Firmware
TABLE 9-18:
I 2 CM ‘CMD’ TAG BYTES
I CM_START
Issue I C? Start
I CM_STOP
Issue I C? Stop
I CM_RESTART
Issue I C? Restart
I CM_WRITE_BYTES
TAG/CCMD
0x80
0x81
0x82
0x83
0x84
LEN
1
1
1
1
N+2
I 2 CM_INIT
2
2
2
2
Name
Description
Initialize master
0
TAG
2
0
TAG
2
0
TAG
2
0
TAG
Write bytes
0
TAG
1
byte count (N)
2
data byte
N+1 data byte
0x85
0x86
2
1
I 2 CM_READ_BYTES
I 2 CM_READ_BLOCK
Read bytes – ACK all bytes
0
TAG
1
byte count (N)
Read block – ACK all bytes
0
TAG
0x87
2
I 2 CM_BIT_RATE
Set
I 2 C ?
bit rate
0
1
TAG
bit rate
0x88
0x89
0x8A
1
2
1
I 2 CM_RESET
I 2 CM_READ_BYTES_NLB
I 2 CM_READ_BLOCK_NLB
Reset MSSP module
0
TAG
Read bytes – NACK last byte
0
TAG
1
byte count (N)
Read block – NACK last byte
0
TAG
An example of a data stream in the script buffer that would direct the COMM back to
communicate in I 2 C to the unit.
Under test is as follows:
0x81
0x84
0x02
0xA8
0x01
0x83
0x84
0x01
0xA9
0x89
0x01
0x82
? 2007 Microchip Technology Inc.
I 2 CM_START
I 2 CM_WRITE_BYTES
Number of bytes
I 2 C? address for writing
I 2 C? command code
I 2 CM_RESTART
I 2 CM_WRITE_BYTES
Number of bytes
I 2 C? address for reading
I 2 CM_READ_BYTES_NLB
Number of bytes
I 2 CM_STOP
DS51647A-page 85
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