SSPBMg-C400-BRE
12.3.1 T
RANSMISSION
I
NTERFACE
A request packet (see
TABLE 14
) is sent by the IDU and the respective response packet (see
TABLE 15
) by the SSPB. The IDU is the bus master. The SSPB is only allowed to respond if
the first byte of the request packet matches its address and the checksum is consistent.
pon reception of a request packet the SSPB will perform
U
the following consistency checks:
2) Verify that the packet address corresponds with the SSPB address.
test (2) but fails in test (3) or in test (4), a response
rned. Bit #2 of byte #5 will be set to 1 to indicate that an inconsistency was
1) Verify that the checksum is consistent.
3) Verify that the received command corresponds to a defined command.
4) Verify that, if data is required for the command, its value is valid.
f the received packet passes test (1) and
I
packet will be retu
detected in the request packet.
Page
43
Summary of Contents for SSPBMg-C400-BRE
Page 12: ...SSPBMg C400 BRE Figure 1 Product Outline Page 11 ...
Page 13: ...SSPBMg C400 BRE Figure 2 Product Outline fans side view Page 12 ...
Page 17: ...SSPBMg C400 BRE Figure 4 Connectors Page 16 ...
Page 29: ...SSPBMg C400 BRE Figure 7 HyperTerminal RS 232 Communication help command and response Page 28 ...