Sharp MD-C2 Service Manual page 95

IC1701 VHiUDA1344/-1: AD/DA Converter (UDA1344)
Pin No. Terminal Name
1 V AD converter analog ground
SSA(ADC)
2 V AD converter analog power
DDA(ADC)
3 VINL AD converter input (left)
4 Vref(A) AD converter reference voltage
5 VINR AD converter input (right)
6 V AD converter reference voltage N
ADCN
7 V AD converter reference voltage P
ADCP
8* TEST1 Mode control 1 (Pulled-down), Test terminal
9* OVERFL Multi-purpose pin 1, Test terminal
10 V Digital power
DDD
11 V Digital ground
SSD
12 SYSCLK System clock 256fs, 384fs, 512fs
13 MP2(L3 MODE) For data communication with the MD microcomputer
14 MP3(L3 CLK) For data communication with the MD microcomputer
15 MP4(L3 DATA) For data communication with the MD microcomputer
16 BCK Bit clock input
17 WS Word select input
18 DATAO Data output
19 DATAI Data input
20* TEST3 Multi-purpose pin 5 (Pulled-down) , Test terminal
21* TEST2 Mode control 2 (Pulled-down) , Test terminal
22 AV DA converter analog ground
SS
23 AV DA converter analog power
DD
24 VOUTR DA converter output (right)
25 V Opeamp power
DDO
26 VOUTL DA converter output (left)
27 V Opeamp ground
SSO
28 Vref(D)Input AD converter reference voltage
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
V DDA(ADC) V SSA(ADC) V ADCP V ADCN
1
2
0dB/6dB
3
VINL
switch
V DDD
10
DECMATION FILTER
UDA1344
V SSD
11
DC-CANCELLATION FILTER
DATAO 18
16
BCK
INTERFACE
WS 17
19
DATAI
OVERFL 9
DSP FEATURES
INTERPOLATION FILTER
NOISE SHAPER
26
VOUTL
25 27
V DDO
V DDA(DAC)
V SSO
Figure 95 BLOCK DIAGRAM OF IC
Function
V ref(A)
7 6
4
0dB/6dB
switch
ADC
ADC
DIGITAL L3-BUS
INTERFACE
DAC DAC
28
23 22
V SSA(DAC)
Vref(D)
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5
VINR
8 TEST1
21
TEST2
TEST3
20
13
MP2
14
MP3
15
MP4
12
SYSCLK
VOUTR
24
MD-C2