lm4935rlx National Semiconductor Corporation, lm4935rlx Datasheet - Page 64

• Manufacturer Part Number: lm4935rlx
• Description: Audio Sub-system With Dual-mode Stereo Headphone And Mono High Efficiency Loudspeaker Amplifiers And Multi-purpose Adc
• Manufacturer: National Semiconductor Corporation

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12.0 Status & Control Registers
12.39 SAR TRIGGER 1 CONFIGURATION REGISTER
This register is used to setup a voltage trigger on one of the SAR outputs.
Bits
3:2
7:4
0
1
TRIG_1_SOURCE
TRIG_1_ENB
TRIG_1_LSB
TRIG_1_DIR
Field
TABLE 40. TRIG_1 (0x22h)
Enables the 1st SAR trigger interrupt, if cleared will clear the IRQ.
Selects the direction the voltage should be moving:
Programs the channel used by the trigger.
Sets bits 3:0 of the threshold used by the trigger.
(Continued)
TRIG_1_SOURCE
TRIG_1_DIR
64
00
01
10
11
0
1
2
2
2
2
Description
Trigger if signal passes:
D_V
Above Threshold
Below Threshold
DD
A_V
VSAR_1
VSAR_2
Source
/2 or BB_V
DD
/2
DD