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參數(shù)資料
| 型號： | W78C052D40DL |
| 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, MROM, 40 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | ROHS COMPLIANT, DIP-40 |
| 文件頁數(shù)： | 4/21頁 |
| 文件大?。?/td> | 280K |
| 代理商： | W78C052D40DL |
W78C52D/W78C052D
- 4 -
4. PIN DESCRIPTION
P0.0
P0.7
Port 0, Bits 0 through 7. Port 0 is a bidirectional I/O port. This port also provides a multiplexed low
order address/data bus during accesses to external memory.
P1.0
P1.7
Port 1, Bits 0 through 7. Port 1 is a bidirectional I/O port with internal pull-ups. Pins P1.0 and P1.1
also serve as T2 (Timer 2 external input) and T2EX (Timer 2 capture/reload trigger), respectively.
P2.0
P2.7
Port 2, Bits 0 through 7. Port 2 is a bidirectional I/O port with internal pull-ups. This port also provides
the upper address bits for accesses to external memory.
P3.0
P3.7
Port 3, Bits 0 through 7. Port 3 is a bidirectional I/O port with internal pull-ups. All bits have alternate
functions, which are described below:
PIN
P3.0
P3.1
ALTERNATE FUNCTION
RXD Serial Receive Data
TXD Serial Transmit Data
P3.2
INT0
External Interrupt 0
P3.3
INT1
External Interrupt 1
T0 Timer 0 Input
T1 Timer 1 Input
WR
Data Write Strobe
RD
Data Read Strobe
P3.4
P3.5
P3.6
P3.7
P4.0
P4.3
Another bit-addressable bidirectional I/O port P4. P4.3 and P4.2 are alternative function pins. It can be
used as general I/O pins or external interrupt input sources (
INT2
/
INT3
).
EA
External Address Input, active low. This pin forces the processor to execute out of external ROM. This
pin should be kept low for all W78C31 operations.
RST
Reset Input, active high. This pin resets the processor. It must be kept high for at least two machine
cycles in order to be recognized by the processor.
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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W78C052D40FL | 8-BIT MICROCONTROLLER |
| W78C052D40PL | 8-BIT MICROCONTROLLER |
| W78C31B | 8-BIT Microcontroller(8位的微控制器) |
| W78C32B | 8-BIT Microcontroller(8位的微控制器) |
| W78C32CP-24 | 8-BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W78C052D40FL | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W78C052D40PL | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W78C154 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT EMULATION MICROCONTROLLER |
| W78C154-16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| W78C154-24 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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