SNLS249M – FEBRUARY 2007 – REVISED APRIL 2013
9. The Device drives the 8-bit data value (register contents).
10. The Host drives a NACK bit “1”indicating end of the READ transfer.
11. The Host drives a STOP condition.
12. The Host de-selects the device by driving its SMBus CS signal Low.
The READ transaction is completed, the bus goes IDLE and communication with other SMBus devices may now
occur.
See
for more information.
Table 1. SMBus Register Descriptions
(1)
Name
Address
Default
Type
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Status
0x00
0x00
RO
ID Revision
Reserved
Reserved
Reserved
SD
Status
0x01
0x00
RO
Reserved
Boost 1
EN
Reserved
Status
0x02
0x00
RO
Reserved
Boost 3
Reserved
Boost 2
Internal
0x03
0x77
RW
EN (Int.)
Boost Control
EN (Int.)
Reserved
Enable/
0:Enable
(BC for CH0)
0:Enable
Individual
1:Disable
000 (Min Boost)
1:Disable
Channel
(D_IN0±)
001
(C_IN±)
Boost
010
Control
011
for
100
C_IN±,
101
D_IN0±
110
111 (Max Boost)
Individual
0x04
0x77
RW
EN (Int.)
Boost Control
EN (Int.)
Boost Control
Channel
0:Enable
(BC for CH2)
0:Enable
(BC for CH1)
Boost
1:Disable
000 (Min Boost)
1:Disable
000 (Min Boost)
Control
(D_IN2±)
001
(D_IN1±)
001
for
010
010
D_IN1±,
011
011
D_IN2±
100
100
101
101
110
110
111 (Max Boost)
111 (Max Boost)
Signal
0x05
0x00
RW
Reserved
Threshold (mV)
Detect ON
00: 70 (Default)
(SD_ON)
01: 55
10: 90
11: 75
Signal
0x06
0x00
RW
Reserved
Threshold (mV)
Detect OFF
00: 40 (Default)
(SD_OFF)
01: 30
10: 55
11: 45
SMBus
0x07
0x00
RW
Reserved
SMBus
orCMOS
Enable
Control for
0: Disable
EN
1: Enable
Output
0x08
0x78
RW
Reserved
Output Level:
Reserved
Level
00: 540 mVp-p
01: 770 mVp-p
10: 1000 mVp-p
11: 1200 mVp-p
(1)
Note: RO = Read Only, RW = Read/Write
Copyright © 2007–2013, Texas Instruments Incorporated
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