PICkit? Serial Analyzer Firmware
TABLE 9-24:
SPI ‘CMD’ TAG BYTES
TAG/CCMD
0x80
0x81
LEN
1
2
Name
SPI_MODE_IDLE
SPI_INIT_MODE
Description
Set to IDLE
TAG
0
Initialize SPS controller as per DATA
TAG
0
Configuration bits
1
(ref section x.x.x)
0x83
3
SPI_BITRATE
Set bit rate
TAG
0
scaler
1
2 pre-scaler
(ref section x.x.x)
0x84
0x85
2
N+2
SPI_DATAIO_IN
SPI_DATAIO_OUT
Input data
TAG
0
byte count (N)
1
Output data
TAG
0
byte count (N)
1
2 data
N+1 data
0x86
N+2
SPI_DATAIO_INOUT
Output data
TAG
0
byte count (N)
1
2 data
N+1 data
0x87
0x88
0x89
0x8A
1
1
1
1
SPI_SDO_IN
SPI_SDO_OUT
SPI_RESET
SPI_INIT
Set SDO pin to INPUT (tri-state)
TAG
0
Set SDO pin to OUTPUT
TAG
0
Reset SPI controller to IDLE
TAG
0
Initialize SPI controller per
CONTROL BLOCK
0
TAG
0x8B
0x8C
1
1
SPI_CS_ON
SPI_CS_OFF
Assert CS* (low true)
TAG
0
De-assert CS*
TAG
0
TABLE 9-25:
SPI ‘DATA’ TAG BYTES
TAG/CDATA
0x80
0x81
0x82
LEN
2
2
2
Name
SPI_EVENT_BYTE_TX
SPI_EVENT_BYTE_RX
SPI_EVENT_STATUS_ERR
Description
BYTE transmit
TAG
0
data
1
BYTE transmit
TAG
0
data
1
Status error
? 2007 Microchip Technology Inc.
0
1
TAG
error byte
DS51647A-page 89
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