參數(shù)資料
型號(hào)： W78L516A24PL
廠商： WINBOND ELECTRONICS CORP
元件分類： 微控制器/微處理器
英文描述： 8-BIT MICROCONTROLLER
中文描述： 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQCC44
封裝： ROHS COMPLIANT, PLASTIC, LCC-44
文件頁(yè)數(shù)： 6/37頁(yè)
文件大小： 256K
代理商： W78L516A24PL
W78LE516/W78L516A
- 6 -
4. PIN DESCRIPTION
SYMBOL
TYPE
DESCRIPTIONS
EA
I
EXTERNAL ACCESS ENABLE: This pin forces the processor to execute the
external ROM. The ROM address and data will not be presented on the bus if
the
EA
pin is high.
PSEN
O H
PROGRAM STORE ENABLE:
PSEN
enables the external ROM data in the
Port 0 address/data bus. When internal ROM access is performed, no
PSEN
strobe signal outputs originate from this pin.
ALE
O H
ADDRESS LATCH ENABLE: 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.
RST
I L
RESET: A high on this pin for two machine cycles while the oscillator is
running resets the device.
XTAL1
I
CRYSTAL 1: This is the crystal oscillator input. This pin may be driven by an
external clock.
XTAL2
O
CRYSTAL 2: This is the crystal oscillator output. It is the inversion of XTAL1.
V
SS
I
GROUND: ground potential.
V
DD
I
POWER SUPPLY: Supply voltage for operation.
P0.0
P0.7
I/O D PORT 0: Function is the same as that of standard 8052.
P1.0
P1.7
I/O H PORT 1: Function is the same as that of standard 8052.
P2.0
P2.7
I/O H provides the upper address bits for accesses to external memory.
P3.0
P3.7
I/O H PORT 3: Function is the same as that of the standard 8052.
P4.0
P4.3
I/O H PORT 4: A bi-directional I/O. See details below.
*
Note:
TYPE
I: input, O: output, I/O: bi-directional, H: pull-high, L: pull-low, D: open drain
PORT4
Another bit-addressable port P4 is also available and only 4 bits (P4<3:0>) can be used. This port
address is located at 0D8H with the same function as that of port P1,
Example:
P4 REG 0D8H
MOV P4, #0AH ; Output data "A" through P4.0
P4.3.
MOV A, P4 ; Read P4 status to Accumulator.
ORL P4, #00000001B ; Set bit P4.0
ANL P4, #11111101B ; Clear bit P4.1
相關(guān)PDF資料
PDF描述
W78LE516A 8-BIT MICROCONTROLLER
W78L516A24DL 8-BIT MICROCONTROLLER
W78L516A24FL 8-BIT MICROCONTROLLER
W78L516A24LL 8-BIT MICROCONTROLLER
W78L52 8-BIT MICROCONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W78L51F-24 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W78L51P-24 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W78L52 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W78L52-24 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W78L52F-24 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
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