NEC MultiSync V520 Service Manual page 50

GENERAL DESCRIPTION
The WT6016 is a member of WT60XX microcontroller family. It is specially designed for digital con-
trolled multi-sync monitor. It contains 8-bit CPU, 16K bytes ROM, 288 bytes RAM, 14 PWMs, parallel I/
O, SYNC processor, timer, one DDC interface (slave mode I²C interface with DDC1), one master/slave
I²C interface, two 4-bit A/D converters and watch-dog timer.
FEATURES
* 8-bit 6502 compatible CPU, 4MHz operating frequency
* 16384 bytes ROM, 288 bytes SRAM
* 8MHz crystal oscillator
* 14 channels 8-bit/62.5kHz PWM outputs (8 open drain outputs & 6 CMOS outputs)
* Sync signal processor with H+V separation, frequency calculation, H/V polarity detection/control
* Three free-running sync signal outputs for burn-in test (64kHz/62.5Hz, 48kHz/75Hz, 31kHz/60Hz)
* Self-test pattern generator generates cross hatch picture
* DDC interface supports VESA DDC1/DDC2B standard
* Master/slave I²C interface
* Watch-dog timer (0.524 second)
* Maximum 25 programmable I/O pins
* One 8-bit programmable timer
* Two 4-bit A/D converter
* One external interrupt request
* Built-in low V voltage reset
DD
* +5V power supply
PIN ASSIGNMENT
40 Pin
DA2
1
DA1
2
DA0
3
RESET
4
VDD
5
GUD
6
OSCO
7
OSCI
8
PB5/SDA2
9
PB4/SCL2
10
WT6016
PB3/PAT 11
PB2
12
PB1
13
PB0
14
PB6/IRQ
15
PC7
16
PC6
17
PC5
18
PC4
19
PC3
20
* I²C is a trademark of Philips Corporation.
* DDC is a trademark of video Electronics Standard Association (VESA).
VSYNC
40
HSYNC
39
DA3
38
DA4
37
DA5
36
DA6
35
DA7
34
PA7/HSO
33
PA6/VSO
32
PA5/DA13
31
PA4/DA12
30
PA3/DA11
29
PA2/DA10
28
PA1/DA9
27
PA0/DA8
26
SCL1/PD0
25
SDA1/PD0
24
PC0/AD0
23
PC1/AD1
22
PC2
21
42 Pin SDIP
DA2 1
DA1
2
DA0
3
RESET
4
VDD
5
NC
6
7
GUD
OSCO 8
9
OSCI
PB5/SDA2 10
WT6016
PB4/SCL2 11
PB3/PAT 12
13
PB2
PB1 14
15
PB0
PB6/IRQ 16
PC7 17
PC6 18
PC5 19
PC4 20
PC3 21
47
42 VSYNC
41 HSYNC
40 DA3
39 DA4
38 DA5
37 NC
36 DA6
35 DA7
34 PA7/HSO
33 PA6/VSO
32 PA5/DA13
31 PA4/DA12
30 PA3/DA11
29 PA2/DA10
28 DA1/DA9
27 PA0/DA8
26 SCL1/PD0
25 SDA1/PD1
24 PC0/AD0
23 PC1/AD1
22 PC2