HI-3110
Table 2. SPI Transmit Data Format
b) Extended Frame Transmit
Byte
Content
Bit Description (”x” = Don’t care)
x
x
1
2
3
Message Tag*
ID28 to ID21
ID20 to ID18, SRR, IDE,
ID17 to ID15
4
5
ID14 to ID7
ID6 to ID0, RTR
r0, r1, DLC3 to DLC0
Data Byte 1
x
x
6
7
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
8
Data Byte 2
9
Data Byte 3
10
11
12
13
14
Data Byte 4
Data Byte 5
Data Byte 6
Data Byte 7
Data Byte 8
* Note: The Message Tag is a host-assigned identifier that is stored along with a time tag in the Transmit
History FIFO. It can be used by the host to log successfully transmitted messages at a later time.
HOLT INTEGRATED CIRCUITS
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