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參數(shù)資料
| 型號(hào)： | HT48CA3 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 8-Bit Remote Type MCU |
| 中文描述： | 8位遙控型單片機(jī) |
| 文件頁數(shù)： | 2/36頁 |
| 文件大?。?/td> | 271K |
| 代理商： | HT48CA3 |
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Pin Assignment
Pin Description
Pin Name
I/O
ROM Code
Option
Description
RES
I
Schmitt trigger reset input, active low.
PA0~PA7
I/O
Wake-up*
Pull-high***
Bidirectional 8-bit input/output port. Each bit can be configured as a
wake-up input by a mask option. Software instructions determine the
CMOS output or Schmitt trigger input with/without pull-high resistor. The
pull-high resistor of each input/output line is also optional.
PB0/PFD
PB1~PB7
I/O
Pull-high**
PB0 or PFD
Bidirectional 8-bit input/output port. Software instructions determine
the CMOS output or Schmitt trigger input with/without pull-high resis-
tor. The pull-high resistor of each input/output line is also optional. The
output mode of PB0 can be used as an internal PFD signal output and
it can be used as a various frequency carrier signal.
VSS
Negative power supply, ground
PC0/TMR0
PC1~PC4
PC5/TMR1
I/O
Pull-high*
Bidirectional 6-bit input/output port. Software instructions determine
the CMOS output or Schmitt trigger input with/without pull-high resis-
tor.Thepull-highresistorofeachinput/outputlineisalsooptional.PC0
and PC5 are pin shared with TMR0 and TMR1 function pins.
PF0/INT
I/O
Pull-high*
Bidirectional 1-bit input/output port. Software instructions determine
the CMOS output or Schmitt trigger input with/without pull-high resis-
tor. The pull-high resistor of this input/output line is also optional. PF0
is pin shared with the INT function pin.
VDD
Positive power supply
OSC1
OSC2
I
O
Crystal
or RC
OSC1, OSC2 are connected to an RC network or Crystal (determined
byhardwareoption)fortheinternalsystemclock.InthecaseofRCop-
eration, OSC2 is the output terminal for 1/4 system clock.
Note:
* Bit option
** Nibble option
*** Byte option
HT48CA3
Rev. 1.40
2
July 16, 2003
2
/
3
0
1
4
5
2
/
3
0
4
1
0
3
/
2
5
4
1
- 3
- /
$ 1
$ 0
$ 3
$ /
0
1
4
- 0
- 1
$ 4
$
$
$
- 4
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