
1997
Dec
15
6
Philips
Semiconductors
Product
specication
8-bit
microcontrollers
P83C524;
P80C528;
P83C528
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5
BLOCK
DIAGRAM
handbook,
full
pagewidth
PROGRAMMABLE I/O
64K-BYTE BUS
EXPANSION
CONTROL
OSCILLATOR
AND
TIMING
CPU
internal
interrupts
PROGRAM
MEMORY
(32 K x 8 ROM/
EPROM)
DATA
MEMORY
(256 x 8 RAM)
PROGRAMMABLE
SERIAL PORT
FULL DUPLEX UART
SYNCHRONOUS
SHIFT
TWO 16-BIT
TIMER/EVENT
COUNTERS
XTAL2
XTAL1
frequency
reference
T0
T1
counters
external interrupts
control
parallel ports,
address/data bus
and I/O pins
serial in
serial out
INT1
INT0
MBC455
DATA
MEMORY
(256 x 8 RAM)
16-BIT
TIMER
WATCHDOG
TIMER
T2
T2EX
RST
BIT-LEVEL
INTERFACE
I C
2
AUX - RAM
RAM
shared with Port 3
SDA
SCL
Fig.1 Block diagram.
PROGRAM
MEMORY
(32 K x 8 ROM
or 16 K x 8 ROM)
P83C524
P80C528
P83C528