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W78C032C 데이터시트 PDF : 부품 기능 및 핀배열

부품번호 W78C032C
기능 8-BIT MICROCONTROLLER
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W78C032C 데이터시트 및 W78C032C PDF

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W78C032C pdf, 반도체, 판매, 대치품
W78C32C/W78C032C
4. PIN DESCRIPTION
P0.0P0.7
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.
P1.0P1.7
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.
P2.0P2.7
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.
P3.0P3.7
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 ALTERNATE FUNCTION
P3.0
RXD Serial Receive Data
P3.1
TXD Serial Transmit Data
P3.2
INT0 External Interrupt 0
P3.3
P3.4
INT1 External Interrupt 1
T0 Timer 0 Input
P3.5
T1 Timer 1 Input
P3.6
WR Data Write Strobe
P3.7
RD Data Read Strobe
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 W78C032C 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 state during reset with a weak
pull-up.
-4-

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W78C032C 전자부품, 판매, 대치품
W78C32C/W78C032C
5.3.2 Power-down Mode
When the PD bit of the PCON register is set, the processor enters the power-down mode. In this mode
all of the clocks, including the oscillator are stopped. The only way to exit power-down mode is by a
reset.
5.3.3 Reset
The external RESET signal is sampled at S5P2. To take effect, it must be held high for at least two
machine cycles while the oscillator is running.
An internal trigger circuit in the reset line is used to deglitch the reset line when the W78C032C is used
with an external RC network. The reset logic also has a special glitch removal circuit that ignores
glitches on the reset line.
During reset, the ports are initialized to FFH, the stack pointer to 07H, PCON (with the exception of bit
4) to 00H, and all of the other SFR registers except SBUF to 00H. SBUF is not reset.
Publication Release Date: December 4, 2006
- 7 - Revision A6

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부품번호상세설명 및 기능제조사
W78C032C

The functions of this components is a 8-BIT MICROCONTROLLER.

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