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參數資料
| 型號： | HT48R50A-1 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設備) |
| 中文描述： | 8位高性能RISC架構微控制器等的多個I / O應用（高性能，指令類似的RISC的8位微控制器，用于多予適用/輸出接口設備） |
| 文件頁數： | 4/50頁 |
| 文件大小： | 345K |
| 代理商： | HT48R50A-1 |
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Pin Description
Pin Name
I/O
ROM Code
Option
Description
PA0~PA7
I/O
Pull-high*
Wake-up
CMOS/schmitt
trigger input
Bidirectional 8-bit input/output port. Each bit can be con-
figured as a wake-up input by ROM code option. Software
instructions determine the CMOS output or schmitt trigger
or CMOS input (depends on options) with pull-high resistor
(determined by 1-bit pull-high option).
PB0/BZ
PB1/BZ
PB2~PB7
I/O
Pull-high*
PB0 or BZ
PB1 or BZ
Bidirectional 8-bit input/output port. Software instructions
determine the CMOS output or schmitt trigger input with
pull-high resistor (determined by 1-bit pull-high option).
The PB0 and PB1 are pin-shared with the BZ and BZ, re-
spectively. Once the PB0 or PB1 is selected as buzzer out-
put, the output signals come from an internal PFD
generator (shared with timer/event counter 0).
PD0~PD7
I/O
Pull-high*
Bidirectional I/O lines. Software instructions determine the
CMOS output or schmitt trigger input with pull-high resis-
tor (determined by 1-bit pull-high option).
VSS
Negative power supply, ground
PG0/INT
I/O
Pull-high*
Bidirectional I/O lines. Software instructions determine the
CMOS output or schmitt trigger input with pull-high resis-
tor (determined by 1-bit pull-high option). This external in-
terrupt input is pin-shared with PG0. The external
interrupt input is activated on a high to low transition.
TMR0
I
Timer/event counter 0 schmitt trigger input (without
pull-high resistor)
PC0~PC7
I/O
Pull-high*
Bidirectional I/O lines. Software instructions determine the
CMOS output or schmitt trigger input with pull-high resis-
tor (determined by 1-bit pull-high option).
TMR1
I
Timer/event counter 1 schmitt trigger input (without
pull-high resistor)
RES
I
Schmitt trigger reset input. Active low
VDD
Positive power supply
HT48R50A-1
4
December 19, 2000
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