NEC NEC MultiSync LCD1525V LCD1525V LCD1525V, Руководство по обслуживанию

Страница: 88 / 109

7-9
7.8 List of CPU Pin Assignments
Port Pin
NO Signal
name
Function Remarks Destina-tion Pull
up
Vss1 1 N.C Optional GRD
P1.0 2 HDATA0 B135 Serial Data Data I/O terminal for communication O
P1.1 3 HDATA1 B135 Serial Data Data I/O terminal for communication O
P1.2 4 HDATA2 B135 Serial Data Data I/O terminal for communication O
P1.3 5 HDATA3 B135 Serial Data Data I/O terminal for communication O
P1.4 6 HCLK B135 Serial Clock Clock output terminal for B135 CPU
communication
P1.5 7 HFS B135 Data Enable High: enable / low: disable
B135
P1.6 8 A16 Address Not used I203 O
P1.7 9 PWM Back light control PWM
signal I104
- 10 RST Reset I206,I208
P3.0 11 RXD Receive Data -
- 12 N.C -
P3.1 13 TXD Transmit Date I/O port with internal pull-up -
P3.2 14 IRQ B135 Interruption signal I/O port with internal pull-up B135
P3.3 15 SCL Serial Clock I/O port with internal pull-up I205 O
P3.4 16 SDA Serial Data I/O port with internal pull-up I205 O
P3.5 17 Uc-PBIAS Back light control ON/OFF
signal I/O port with internal pull-up I104
P3.6 18 WR External data memory write
strobe I I/O port with internal pull-up I204,I206
P3.7 19 RD External data memory read
strobe I/O port with internal pull-up I204
- 20 XTAL2 Crystal 1 Output from the inverting oscillator X201
- 21 XTAL Crystal 2 X201
- 22 GRD -
- 23 N.C -
P2.0 24 A8 Address I/O port with internal pull-up
P2.1 25 A9 Address I/O port with internal pull-up
P2.2 26 A10 Address I/O port with internal pull-up
P2.3 27 A11 Address I/O port with internal pull-up
P2.4 28 A12 Address I/O port with internal pull-up
P2.5 29 A13 Address I/O port with internal pull-up
I202,I203,I204
P2.6 30 A14 Address I/O port with internal pull-up I202,I203,I204
,I206
P2.7 31 A15 Address I/O port with internal pull-up I202,I203,I204
,I209
- 32 PSEN Program Store Enable I203,I209
- 33 ALE Address Latch
Enable/Probram Pulse I202
- 34 N.C -
- 35 EV/Vpp External Access
Enable/Programming
Supply Voltage -
P0.7 36 D7 Address/Data I/O port
P0.6 37 D6 Address/Data I/O port
P0.5 38 D5 Address/Data I/O port
P0.4 39 D4 Address/Data I/O port
P0.3 40 D3 Address/Data I/O port
P0.2 41 D2 Address/Data I/O port
P0.1 42 D1 Address/Data I/O port
P0.0 43 D0 Address/Data I/O port
I202,I203,I204
,I208
- 44 Vcc Source V5V) -