參數資料
型號: HT48C50
廠商: Holtek Semiconductor Inc.
英文描述: 8-Bit Microcontroller Series
中文描述: 8位微控制器系列
文件頁數: 7/59頁
文件大小: 2625K
代理商: HT48C50
Pin Description of HT48C30
Pin Name
I/O
Mask
Option
F unction
PA0~PA7
I/O
Wake-up
Pull-high
or None
Bidirectional 8-bit input/output ports
E ach bit can be configured as a wake-up input by mask option.
Software instructions determine the CMOS output or schmitt
trigger input with or without a pull high resistor (by mask option).
PB0~PB7
I/O
Pull-high
or None
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or schmitt
trigger input with or without a pull high resistor (by mask
option).
VSS
Negative power supply, GND
INT
I
E xternal interrupt schmitt trigger input with a pull high
resistor. E dge triggered is activated on a high to low transition.
TMR
I
Schmitt trigger input for timer/event counter
PC0~PC5
I/O
Pull-high
or None
Bidirectional 6-bit input/output ports
Software instructions determine the CMOS output or schmitt
trigger input with or without a pull high resistor (by mask
option).
RE S
I
Schmitt trigger reset input, active low
VDD
Positive power supply
OSC1
OSC2
I
O
Crystal or
RC
OSC1 and OSC2 are connected to an RC network or a crystal
(by mask option) for the internal system clock. In the case of RC
operation, OSC2 is the output terminal for 1/4 system clock.
HT48CXX/HT48RXX
7
25th May ’99
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