
SM8213AM
NIPPON PRECISION CIRCUITS—24
Received Data
Bit 1
The receive data leading bit is always 1.
Bit 2
Message/address indicator flag.
When 0, the data is an address.
When 1, the data is a message.
Bit 3
Self address indicator flag.
When 1, the data is treated as a self address (device
address).
When 0, the data is a message.
When this bit is set to 1, the self address corresponds
to one of the addresses indicated by bits 4 to 6.
Bits 4 to 6
Address call sign flags.
When bit 3 of data is 1, indicating a self address,
these bits indicate the call sign.
When the data is a message, all 3 bits are set to 0.
Bits 7 to 8
Function bit flags.
When bit 3 of data is 1, indicating a self address,
these bits set the call function for the address indi-
cated by bits 4 to 6.
However, when a dummy address is received
(address H), bits 7 and 8 are both set to 0.
When the data is a message, both bits are set to 0.
Table 7. Receive data format
Bit
Reception data
1
1
2
MESSAGE/ ADDRESS
3
SELF ADDRESS
4
ADDRESS 2 (ADDR 2)
5
ADDRESS 1 (ADDR 1)
6
ADDRESS 0 (ADDR 0)
7
FUNCTION 1 (FUNC 1)
8
FUNCTION 0 (FUNC 0)
9
SYN - VAL
10
ERROR 1 (ERR 1)
11
ERROR 0 (ERR 0)
12
PARITY ERROR
13
MESSAGE 1/ADDRESS 1
14
MESSAGE 2/ADDRESS 2
15
MESSAGE 3/ADDRESS 3
16
MESSAGE 4/ADDRESS 4
17
MESSAGE 5/ADDRESS 5
18
MESSAGE 6/ADDRESS 6
19
MESSAGE 7/ADDRESS 7
20
MESSAGE 8/ADDRESS 8
21
MESSAGE 9/ADDRESS 9
22
MESSAGE 10/ADDRESS 10
23
MESSAGE 11/ADDRESS 11
24
MESSAGE 12/ADDRESS 12
25
MESSAGE 13/ADDRESS 13
26
MESSAGE 14/ADDRESS 14
27
MESSAGE 15/ADDRESS 15
28
MESSAGE 16/ADDRESS 16
29
MESSAGE 17/ADDRESS 17
30
MESSAGE 18/ADDRESS 18
31
MESSAGE 19/FUNCTION 1
32
MESSAGE 20/FUNCTION 0
ADDR 2
ADDR 1
ADDR 0
Name
0
0
0
A
0
0
1
B
0
1
0
C
0
1
1
D
1
0
0
E
1
0
1
F
1
1
0
G
1
1
1
H
FUNC 1
FUNC 0
Function
0
0
A Call
0
1
B Call
1
0
C Call
1
1
D Call