UPD9611 Datasheet, PDF (20/28 Pages) NEC – FOUR-CHANNEL PCM CODEC

µPD9611
(3) Gain setting timing
SPSYNC
tFSD
SPCLK
1
2
3
tGSR tGHR
8
9
SPDATA
Don’t
care
D7
Don’t
care
D6
Don’t
care
D5
Don’t
care
D1
Don’t
care
D0
Don’t care
Remark The relationship between SPSYNC and SPCLK is the same as in the receive timing.
DX output measuring circuit
Timing test waveform
VDD
2 kΩ
DX
Output
165 pF
All inputs/outputs other than DX pin
2.0 V _Test 2.0 V
0.8 V ^points 0.8 V
DX pin output
2.4 V _Test 2.4 V
0.4 V ^points 0.4 V
(4) Transmit, receive PCM data input/output timing charts
DCLK
(2.048 MHz)
1 2 3 4 5 6 7 8 9 10 11 12 13
28 29 30 31 32 33
256 1 2 3 4
FSC
(8.0 kHz)
Channel 1 data
Channel 2 data
Hi-Z
DX
D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4
MSB
LSB MSB
Channel 1 data
Channel 2 data
Don’t care
DR
D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4
MSB
LSB MSB
Channel 4 data
Hi-Z
D4 D3 D2 D1 D0
LSB
Channel 4 data
Don’t care
D4 D3 D2 D1 D0
LSB
Channel 1 data
D7 D6 D5 D4
SB
Channel 1 data
D7 D6 D5 D4
MSB
20