HYT TM-800K, Руководство по обслуживанию

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TM-800K Service Manual
22
26 P15 O OUT1/LED5
27 P14 I RXD1
28 P13 O TXD1
29 P12 O HMBL
30 P11 I HOOK/RXD0
31 P10 O TXD0
32 AV
REF
33 AV
SS
34 P27 I IN1
35 P26 I IN2
36 P25 I PF6
37 P24 I PF5
38 P23 I PF4
39 P22 I PF3
40 P21 I PF2
41 P20 I PF1
42 P01 O RLED
43 P00 O GLED
44 P120 O MicMute
4. Flash ROM: AT29C040-90T1 (TX-RX Unit IC103)
4-1 Pin Function
Pin No. Name I/O Function
1-6, 9-20, 31 A18-A0 I Flash ROM address bus.
7 WR I Flash ROM write enable.
8 VCC +5V.
21-23, 25-29 D0-D7 I/O Flash ROM data bus.
24 VSS GND.
30 CE I Flash ROM chip enable.
32 OE I Flash ROM output enable.
5. EEPROM: AT2408N12.5S (TX-RX Unit IC105)
5-1 Pin Function
Pin No. Name I/O Function
1-3 A0-A2 I Address inputs.
4 GND GND.
5 SDA I/O Serial Data.
6 SCL Serial clock input.
7 TEST Test.
8 VCC +5V.
6. Audio processor: AK2346 (TX-RX Unit IC106 and IC900)