Datasheet
DS92LX2121, DS92LX2122
SNLS330I –MAY 2010–REVISED APRIL 2013
www.ti.com
Table 2. DS92LX2122 Control Registers (continued)
Addr
Name Bits Field R/W Default Description
(Hex)
Reserved 7 RESERVED Reserved.
Prescales the SCL clock line when reading data byte
from a slave device (MODE = 0)
000 : ~100 kHz SCL (default)
001 : ~125 kHz SCL
SCL Prescale 6:4 SCL_PRESCALE RW 0
101 : ~11 kHz SCL
110 : ~33 kHz SCL
111 : ~50 kHz SCL
Other values are NOT supported.
Remote NACK Timer Enable In slave mode (MODE = 1)
if bit is set the I2C core will automatically timeout when
REM_NACK_TIM
6
Remote NACK 3 RW 1 no acknowledge condition was detected.
ER
1: Enable
0: Disable
Remote NACK Timeout
000: 2.0 ms
001: 5.2 ms
010: 8.6 ms
REM_NACK_TIME
Remote NACK 2:0 RW 111'b 011: 11.8 ms
R
100: 14.4 ms
101: 18.4 ms
110: 21.6 ms
111: 25.0 ms
Serializer Device ID = 0x58
7:1 SER DEV ID RW 0x58h
(1011_000X) default
7 SER ID
0 RESERVED 0 Reserved
ID[0] Index 7:1 ID[0] INDEX RW 0 Target slave Device ID slv_id1 [7:1]
8
0 RESERVED 0 Reserved.
7:1 ID[1] INDEX RW 0 Target slave Device ID slv_id1 [7:1]
9 ID[1] Index
0 RESERVED 0 Reserved.
7:1 ID[2] INDEX RW 0 Target slave Device ID slv_id2 [7:1]
A ID[2] Index
0 RESERVED 0 Reserved.
7:1 ID[3] INDEX RW 0 Target slave Device ID slv_id3 [7:1]
B ID[3] Index
0 RESERVED 0 Reserved.
7:1 ID[4] INDEX RW 0 Target slave Device ID slv_id4 [7:1]
C ID[4] Index
0 RESERVED 0 Reserved.
7:1 ID[5] INDEX RW 0 Target slave Device ID slv_id5 [7:1]
D ID[5] Index
0 RESERVED 0 Reserved.
7:1 ID[6] INDEX RW 0 Target slave Device ID slv_id6 [7:1]
E ID[6] Index
0 RESERVED 0 Reserved.
7:1 ID[7] INDEX RW 0 Target slave Device ID slv_id7 [7:1]
F ID[7] Index
0 RESERVED 0 Reserved.
7:1 ID[0] MATCH RW 0 Alias to match Device ID slv_id0 [7:1]
10 ID[0] Match
0 RESERVED 0 Reserved.
7:1 ID[1] MATCH RW 0 Alias to match Device ID slv_id1 [7:1]
11 ID[1] Match
0 RESERVED 0 Reserved.
7:1 ID[2] MATCH RW 0 Alias to match Device ID slv_id2 [7:1]
12 ID[2] Match
0 RESERVED 0 Reserved.
7:1 ID[3] MATCH RW 0 Alias to match Device ID slv_id3 [7:1]
13 ID[3] Match
0 RESERVED 0 Reserved.
7:1 ID[4] MATCH RW 0 Alias to match Device ID slv_id4 [7:1]
14 ID[4] Match
0 RESERVED 0 Reserved.
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