Main Board - NAD C 426 Service Manual

Main Board

U201: P89LCP936
P3[1:0]
P2[7:0]
P1[7:0]
P0[7:0]
CRYSTAL
OR
RESONATOR
P2.0/ICB/DAC0/AD03
P2.1/OCD/AD02
P0.0/CMP2/KBI0/AD01
P1.7/OCC/AD00
P1.6/OCB
P1.5/RST
V
SS
P3.1/XTAL1
P3.0/XTAL2/CLKOUT
P1.4/INT1
P1.3/INT0/SDA
P1.2/T0/SCL
P2.2/MOSI
P2.3/MISO
P89LPC933/934/935/936
ACCELERATED 2-CLOCK 80C51 CPU
4 kb/8 kB/16 kB
CODE FLASH
256-BYTE
DATA RAM
512-BYTE
AUXILIARY RAM
512-BYTE
DATA EEPROM
(P89LPC935/936)
PORT 3
CONFIGURABLE I/Os
PORT 2
CONFIGURABLE I/Os
PORT 1
CONFIGURABLE I/Os
PORT 0
CONFIGURABLE I/Os
KEYPAD
INTERRUPT
WATCHDOG TIMER
AND OSCILLATOR
PROGRAMMABLE
OSCILLATOR DIVIDER
X1
CONFIGURABLE
OSCILLATOR
X2
1 28
2 27
3 26
4 25
5 24
6 23
7 22
P89LPC935FDH
8 21
P89LPC936FDH
9 20
10 19
11 18
12 17
13 16
14 15
internal bus
CPU
clock
ON-CHIP
RC
OSCILLATOR
- 19 -
P2.7/ICA
P2.6/OCA
P0.1/CIN2B/KBI1/AD10
P0.2/CIN2A/KBI2/AD11
P0.3/CIN1B/KBI3/AD12
P0.4/CIN1A/KBI4/DAC1/AD13
P0.5/CMPREF/KBI5
V
DD
P0.6/CMP1/KBI6
P0.7/T1/KBI7
P1.0/TXD
P1.1/RXD
P2.5/SPICLK
P2.4/SS
TXD
UART
RXD
SCL
2
I C-BUS
SDA
SPICLK
MOSI
SPI
MISO
SS
REAL-TIME CLOCK/
SYSTEM TIMER
T0
TIMER 0
T1
TIMER 1
CMP2
CIN2B
ANALOG
CIN2A
CMP1
COMPARATORS
CIN1A
CIN1B
OCA
OCB
CCU (CAPTURE/
OCC
COMPARE UNIT)
OCD
(P89LPC935/936)
ICA
ICB
AD10
AD11
ADC1/DAC1
AD12
AD13
DAC1
AD00
AD01
ADC0/DAC0
AD02
(P89LPC935/936)
AD03
DAC1
POWER MONITOR
(POWER-ON RESET,
BROWNOUT RESET)