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LM12454 Datasheet(PDF) 29 Page - Texas Instruments

Part # LM12454
Description  LM12454/LM12458/LM12H458 12-Bit Sign Data Acquisition System with Self-Calibration
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM12454 Datasheet(HTML) 29 Page - Texas Instruments

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LM12454, LM12458, LM12H458
www.ti.com
SNAS079A – MAY 2004 – REVISED FEBRUARY 2006
Table 4. LM12(H)454/8 Memory Map for 16-Bit Wide Data Bus (BW = “0”, Test Bit = “0” and A0 = Don't
Care) (continued)
A4
A3
A2
A1
Pur
Typ
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
pos
e
e
Inter
rupt
Address of
Stat
Actual Number of Conversion
Sequencer
INS
INS
INS
INS
INS
INS
INS
INS
1
0
1
0
R
us
Results in Conversion FIFO
Instruction being
T7
T6
T5
T4
T3
T2
T1
T0
Regi
Executed
ster
Tim
R/W
er
1
0
1
1
Timer Preset High Byte
Timer Preset Low Byte
Regi
ster
Con
versi
Conversion Data:
1
1
0
0
on
R
Address or Sign
Sign
Conversion Data: LSBs
MSBs
FIF
O
Limit
Stat
1
1
0
1
us
R
Limit #2: Status
Limit #1: Status
Regi
ster
Table 5. LM12(H)454/8 Memory Map for 8-Bit Wide Data Bus (BW = “1” and Test Bit = “0”)
A4
A3
A2
A1
A0
Purpose
Type
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
VIN− (MUXOUT−)
VIN+ (MUXOUT+)
0
to
0
R/W
Pause
Loop
Instruction
(1)
(1)
RAM
1
1
1
(RAM
0
0
0
Pointer =
Watch-
00)
0
to
1
R/W
Acquisition Time
8/12
Timer
Sync
dog
1
1
1
0
0
0
R/W
Comparison Limit #1
Instruction RAM
0
to
0
(RAM Pointer = 01)
1
1
1
R/W
Don't Care
>/<
Sign
0
0
0
0
to
1
R/W
Don't Care
>/<
Sign
1
1
1
0
0
0
0
to
0
R/W
Comparison Limit #2
Instruction
RAM
1
1
1
(RAM
0
0
0
Pointer =
10)
0
to
1
R/W
Don't Care
>/<
Sign
1
1
1
Chan
1
0
0
0
0
R/W
I/O Sel
Auto Zeroec
Stand- by
Full Cal
Auto- Zero
Reset
Start
Configuration
Mask
Register
1
0
0
0
1
R/W
Don't Care
DIAG
(2)
Test = 0
RAM Pointer
1
0
0
1
0
R/W
INT7
INT6
INT5
INT4
INT3
INT2
INT1
INT0
Interrupt
Enable
1
0
0
1
1
R/W
Number of Conversions in Conversion FIFO to Generate INT2
Sequencer Address to Generate
Register
INT1
1
0
1
0
0
R
INST7
INST6
INST5
INST4
INST3
INST2
INST1
INST0
Interrupt
Status
Address of Sequencer Instruction
1
0
1
0
1
R
Actual Number of Conversions Results in Conversion FIFO
Register
being Executed
1
0
1
1
0
R/W
Timer Preset: Low Byte
Timer
Register
1
0
1
1
1
R/W
Timer Preset: High Byte
1
1
0
0
0
R
Conversion Data: LSBs
Conversion
FIFO
1
1
0
0
1
R
Address or Sign
Sign
Conversion Data: MSBs
(1)
LM12454 (Refer toTable 7).
(2)
LM12(H)458 only. Must be set to “0” for the LM12454.
Copyright © 2004–2006, Texas Instruments Incorporated
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29
Product Folder Links: LM12454 LM12458 LM12H458


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