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參數(shù)資料
| 型號： | W78152 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | 8-BIT Microcontroller(8位的微控制器) |
| 中文描述： | 8位微控制器（8位的微控制器） |
| 文件頁數(shù)： | 4/18頁 |
| 文件大?。?/td> | 256K |
| 代理商： | W78152 |
W78L52
- 4 -
ALE
Address Latch Enable Output, active high. ALE is used to enable the address latch that separates the
address from the data on Port 0. ALE runs at 1/6th of the oscillator frequency. A single ALE pulse is
skipped during external data memory accesses. ALE goes to a high impedance state during reset with
a weak pull-up.
PSEN
Program Store Enable Output, active low.
PSEN
enables the external ROM onto the Port 0
address/data bus during fetch and MOVC operations.
PSEN
goes to a high impedance state during
reset with a weak pull-up.
XTAL1
Crystal 1. This is the crystal oscillator input. This pin may be driven by an external clock.
XTAL2
Crystal 2. This is the crystal oscillator output. It is the inversion of XTAL1.
V
SS
, V
DD
Power Supplies. These are the chip ground and positive supplies.
BLOCK DIAGRAM
P3.0
~
P3.7
P1.0
~
P1.7
ALU
Port 0
Latch
Port 1
Latch
Ti1
Ti0
Timer
2
Port
1
UART
XTAL1
PSEN
ALE
GND
VDD
RST
XTAL2
Oscillator
Interrupt
PSW
Instruction
Decoder
&
Sequencer
Reset Block
Bus & Clock
Controller
SFR RAM
Address
Power control
256 bytes
RAM & SFR
Stack
Pointer
B
Addr. Reg.
Incrementor
PC
DPTR
Temp Reg.
T2
T1
ACC
Port 3
Latch
Port 4
Latch
Port
3
Port 2
Latch
P4.0
~
P4.3
Port
4
Port
0
Port
P2.0
~
P2.7
P0.0
~
P0.7
INT2
INT3
Watchdog
Timer
8K bytes
ROM
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|---|---|
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| W78L54-24 | 8-BIT MICROCONTROLLER |
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