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參數(shù)資料
| 型號： | HT47C20 |
| 廠商： | Holtek Semiconductor Inc. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 5/56頁 |
| 文件大?。?/td> | 352K |
| 代理商： | HT47C20 |
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Pad Description
Pad No.
Pad Name
I/O
Mask
Option
Function
1
RES
I
Schmitt trigger reset input. Active low.
2
3
4
5
6~9
PA0/BZ
PA1/BZ
PA2/IR
PA3/PFD
PA4~PA7
I/O
Wake-up
Pull-high
or None
CMOS or
NMOS
Bidirectional 8-bit input/output port. The low nibble
of the PA can be configured as CMOS output or
NMOS output with or without pull-high resistors
(mask option). NMOS output can be configured as
schmitt trigger input with or without pull-high resis-
tors. Each bit of NMOS output can be configured as
wake up input by mask option. Of the eight bits,
PA0~PA1 can be set as I/O pins or buzzer outputs by
mask option. PA2 can be set as an I/O pin or an IR
carrier output also by mask option. PA3 can be set as
an I/O pin or a PFD output also by mask option.
10
11
12
13
PB0/INT
PB1
PB2/TMR
PB3
I
Four-bitSchmitttriggerinputport.ThePBisconfig-
ured as with pull-high resistors. Of the four bits, PB0
can be set as an input pin or an external interrupt in-
put pin (INT) by software application. While PB2 can
be set as an input pin or a timer/event counter input
pin also by software application.
14
VSS
Negative power supply, GND
18
17
16
15
IN1
CS1
RS1
RT1
I
O
O
O
Oscillation input pin of channel 1
Reference capacitor connection pin of channel 1
Reference resistor connection pin of channel 1
Resistor sensor connection pin for measurement of
channel 1
23
22
21
20
19
IN0
CS0
RS0
CRT0
RT0
I
O
O
O
O
Oscillation input pin of channel 0
Reference capacitor connection pin of channel 0
Reference resistor connection pin of channel 0
Resistor/capacitor sensor connection pin for mea-
surement of channel 0
Resistor sensor connection pin for measurement of
channel 0
27
26~24
SEG19/COM3
COM2~COM0
O
1/3 or 1/4
Duty
SEG19/COM3 can be set as a segment or a common
output driver for LCD panel by mask option.
COM2~COM0 are outputs for LCD panel plate.
28~46
SEG18~SEG0
O
LCD driver outputs for LCD panel segments
49, 48, 47
51, 50
V1, V2, V3
C1, C2
Voltage pump
52
53
OSC4
OSC3
O
I
Real time clock oscillators
HT47C20
5
January 18, 2000
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