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參數(shù)資料
| 型號(hào)： | W78L058A24PL |
| 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 |
| 文件頁數(shù)： | 4/34頁 |
| 文件大?。?/td> | 238K |
| 代理商： | W78L058A24PL |
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W78LE58/W78L058A
- 4 -
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
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| W78L32 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
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| W78L32P-24 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
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