Aiwa IC-DP200 Service Manual page 26

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IC, TMP87PP21DF
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Pin No. Pin Name
1 VSS
2 XOUT
3 XIN
4 RESET
5 D-I2D
6 D-I2C
7 TEST
8 D-POR
9 ~ 16 D0 ~ D7
17 RTC-CLK
18 D-EOD
19 PRTW
20 CS
21 ALE
22 CLE
23 RD
24 WR
25 R/B
26 D-PRTR
27 D-PUP
TE
L 13942296513
28 D-PCS
29 RTC-DATA
30 DCEN
31 D-PR
32 EL-CON
33 SP-CON
34 RTC-CE
35 USB-CON
36 KEY
37 BATT-CHECK
38 VASS
39 VAREF
40 VDD
41 HOLD
42 ERASE
43 REC-IND
44 USB-SCL
45 USB-SDA
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46 USB-RESET
47 USB-CABLE
.
48 MUTE
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I/O
– Ground.
O Resonator connecting pin for high frequency clock.
I Resonator connecting pin for high frequency clock.
I/O Reset signal input or watchdog timer output/address trap reset output.
I/O I C bus serial data input/output.
2
I/O I C bus serial clock input/output.
2
I Test pin for out-going test. (Connected to VSS)
I Power on reset.
I/O Data input/output.
O Output serial data clock to RTC IC.
I End of DMA.
I Ready to write.
I Chip enable.
I Address latch enable.
I Command latch enable.
I Read enable.
I Write enable.
O Ready/busy.
I Ready to read.
– Connected to VDD.
O Chip select.
I/O Serial data input/output to RTC IC.
I DC/DC enable.
O DMA request.
O EL driver enable control.
O Speaker control.
O Output chip enable to RTC IC.
I/O USB D+ upstream port control.
I Key matrix.
I Battery check.
– Analog ground.
– Analog reference voltage.
– Power supply (+5V).
I Hold switch detection input.
I Erase switch detection input.
– Not used.
I USB serial clock.
I USB serial data
O Power on reset.
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– Connected to transceiver 3.3V.
i
– Not used.
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