W78E51B-40 WINBOND [Winbond], W78E51B-40 Datasheet - Page 4
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W78E51B-40
Manufacturer Part Number
W78E51B-40
Description
8-BIT MTP MICROCONTROLLER
Manufacturer
WINBOND [Winbond]
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
W78E51B-40
Manufacturer:
WINBOND
Quantity:
3 000
Company:
Part Number:
W78E51B-40
Manufacturer:
WINBOND
Quantity:
3 000
Company:
Part Number:
W78E51B-40
Manufacturer:
Winbond
Quantity:
3 000
Part Number:
W78E51B-40
Manufacturer:
WIN
Quantity:
20 000
BLOCK DIAGRAM
FUNCTIONAL DESCRIPTION
The W78E51B architecture consists of a core controller surrounded by various registers, five general
purpose I/O ports, 128 bytes of RAM, two timer/counters, and a serial port. The processor supports
111 different opcodes and references both a 64K program address space and a 64K data storage
space.
New Defined Peripheral
In order to be more suitable for I/O, an extra 4-bit bit-addressable port P4 and two external interrupt
INT2 , INT3 has been added to either the PLCC or QFP 44 pin package. And description follows:
P1.0
P1.7
P3.0
P3.7
P4.3
P4.0
~
~
~
INT2
INT3
Port
1
Port
Port
3
4
Interrupt
UART
Port 3
Port 4
Port 1
Timer
Timer
Latch
Latch
Latch
0
1
XTAL1
Oscillator
XTAL2
PSW
Bus & Clock
Instruction
Sequencer
Controller
Decoder
ALE
ACC
&
T1
PSEN
ALU
Reset Block
Watchdog
SFR RAM
RAM & SFR
Timer
- 4 -
Address
128 bytes
ROM
RST
T2
B
Pointer
Stack
Power control
Vcc
Preliminary W78E51B
Vss
Temp Reg.
Addr. Reg.
Incrementor
DPTR
PC
Port 0
Latch
Port 2
Latch
Port
Port
2
0
P0.0
P0.7
P2.0
P2.7
~
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