Slave address register – Digi NS9750 User Manual
Page 575
w w w . d i g i e m b e d d e d . c o m
5 5 1
I 2 C M a s t e r / S l a v e I n t e r f a c e
Slave Address register
Address: 9050 0008
If using 7-bit addressing, the slave device address field uses only bits D07:01;
otherwise, bits 10:01 are used.
Register bit assignment
Bits
Access
Mnemonic
Reset
Description
D11
R/W
GCA
00
hex
General call address (
s_gca_irq_en
)
Enable the general call address.
Default value is 1.
D10:01
R/W
SDA
00
hex
Slave device address
Default value is 7F
hex
.
Represents bits 6:0 of device address if using 7-bit
address; D10:08 are not used.
Represents bits 9:0 of device address if using 10-bit
address.
D00
R/W
SAM
00
hex
Slave addressing mode
0
7 bit address mode
1
10 bit address mode
Table 340: Slave Address register (7-bit and 10-bit)
13
12
11
10
9
8
7
6
5
4
3
2
1
0
15
14
31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
30
Reserved
Slave device address
Slave
addr
mode
Reserved
Gnrl
call
addr