Datasheet

DS90UB903Q, DS90UB904Q
www.ti.com SNLS332E –JUNE 2010–REVISED APRIL 2013
Table 2. DS90UB904Q Control Registers (continued)
Addr
Name Bits Field R/W Default Description
(Hex)
RESERVED 7 RESERVED 0 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 000'b
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 I
2
C core will
REM_NACK_TIME automatically timeout when no acknowledge condition
6
Remote NACK 3 RW 1
R was detected.
1: Enable
0: Disable
Remote NACK Timeout.
000: 2.0 ms
001: 5.2 ms
010: 8.6 ms
Remote NACK 2:0 NACK_TIMEOUT RW 111'b 011: 11.8 ms
100: 14.4 ms
101: 18.4 ms
110: 21.6 ms
111: 25.0 ms
RW 0xB0'h Serializer Device ID = 0x58'h
7:1 SER DEV ID
(1011_000X'b) default
7 SER ID
0 RESERVED Reserved
7:1 ID[0] INDEX RW 0x00'h Target slave Device ID slv_id0 [7:1]
8 ID[0] Index
0 RESERVED Reserved
7:1 ID[1] INDEX Target slave Device ID slv_id1 [7:1]
9 ID[1] Index RW 0x00'h
0 RESERVED Reserved
7:1 ID[2] INDEX Target slave Device ID slv_id2 [7:1]
A ID[2] Index RW 0x00'h
0 RESERVED Reserved
7:1 ID[3] INDEX Target slave Device ID slv_id3 [7:1]
B ID[3] Index RW 0x00'h
0 RESERVED Reserved
7:1 ID[4] INDEX Target slave Device ID slv_id4 [7:1]
C ID[4] Index RW 0x00'h
0 RESERVED Reserved
7:1 ID[5] INDEX Target slave Device ID slv_id5 [7:1]
D ID[5] Index RW 0x00'h
0 RESERVED Reserved
7:1 ID[6] INDEX Target slave Device ID slv_id6 [7:1]
E ID[6] Index RW 0x00'h
0 RESERVED Reserved
7:1 ID[7] INDEX Target slave Device ID slv_id7 [7:1]
F ID[7] Index RW 0x00'h
0 RESERVED Reserved
7:1 ID[0] MATCH Alias to match Device ID slv_id0 [7:1]
10 ID[0] Match RW 0x00'h
0 RESERVED Reserved
7:1 ID[1] MATCH Alias to match Device ID slv_id1 [7:1]
11 ID[1] Match RW 0x00'h
0 RESERVED Reserved
7:1 ID[2] MATCH Alias to match Device ID slv_id2 [7:1]
12 ID[2] Match RW 0x00'h
0 RESERVED Reserved
7:1 ID[3] MATCH Alias to match Device ID slv_id3 [7:1]
13 ID[3] Match RW 0x00'h
0 RESERVED Reserved
7:1 ID[4] MATCH Alias to match Device ID slv_id4 [7:1]
14 ID[4] Match RW 0x00'h
0 RESERVED Reserved
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