Integration Guide

Software Interface
18 DE2011-DL
Engine Response Format
When the host requests a response from the engine, the response format
will be:
Same as for sent Command Format, plus:
Target slave address includes device address plus read option
(0x01).
For the engine, slave address is 0x5C (or 0xB8 after shifting to 7bit
MSB).
STATUS can be one of the following:
- ACK (0x80)
- NAK (0x82)
- CHECKSUM ERROR (0x84)
Data returned by the issued command (can be one or multiple
bytes or none), L
SB first. See
Table 5 on page 19 .
Command
Parameters:
Data bytes required by the command, shown in Table 5 on page
19
.
Checksum:
1 byte for data integrity check. Checksum is calculated by:
• Summing all command bytes, including command code
and
following data.
• Performing 2's complement of the resulting least significant
byte (LSB).
Stop bit:
Stop bit as I
2
C standard specification.
Start bit Address Command
(hex code)
STATUS Response
Data
…
Stop bit
I
2
C Element
Description
Address:
STATUS:
Response Data:
I
2
C Element
Description