AK4650 Datasheet, PDF (54/86 Pages) Asahi Kasei Microsystems – 16Bit ΔΣ CODEC with MIC/HP/SPK-AMP & TSC

[AK4650]
PM12AD
0
0
1
1
x
x
PMVREF
x
x
x
x
0
1
PINTE INTN VREF
Function
0 Disable x 12bit ADC is powered down. Touch screen driver switch is
open.
1
Enable
x The AK4650 waits for pen touch. 12bit ADC is powered down.
Touch screen driver switch is open (though XP pin is TSVDD
and YN pin is TSVSS).
0 Disable x 12bit ADC is always powered up.
1
Auto
x After the measurement of XY or XYZ, 12bit ADC is
automatically powered down and the AK4650 waits for pen
touch.
x
x
OFF PMVREF bit controls the VREF power-up/down.
x
x
ON
Table 46. 12bit ADC Power-up/down control (x: Don’t care)
DLY3-0 bit
Wait time
0H
1TS
(default)
1H
2TS
2H
4TS
3H
8TS
4H
12TS
5H
16TS
6H
24TS
7H
32TS
8H
48TS
9H
64TS
AH
96TS
BH
128TS
CH
160TS
DH
192TS
EH
224TS
FH
256TS
Table 47. Wait time from mode setting to measurement (1TS = 1SYNC period = 20.83μs@fs=48kHz)
ADFLT bit
Filter
0
Data is not averaged. The AK4650
outputs one measurement result.
1
Four data are averaged.
Table 48. 12bit ADC data filtering (SLOT bit = “0”)
(default)
MS0502-E-01
- 54 -
2007/04