HT47C20L(2000) 查看數據表（PDF） - Holtek Semiconductor
零件编号
产品描述 (功能)
生产厂家
HT47C20L Datasheet PDF : 55 Pages
| |||
HT47C20L
Pin Description
Pin Name
I/O
Mask
Option
Function
RES
I
¾
Schmitt trigger reset input. Active low.
PA0/BZ
PA1/BZ
PA2
PA3/PFD
PA4~PA7
Bidirectional 8-bit input/output port. The low nibble of the PA
I/O
Wake-up
Pull-high
or None
CMOS or
NMOS
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
resistors. 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. PA3 can be set as
an I/O pin or a PFD output by mask option.
PB0/INT
PB1
PB2/TMR
PB3
Four-bit schmitt trigger input port. The PB is configured as
with pull-high resistors. Of the four bits, PB0 can be set as an
I
¾
input pin or an external interrupt input pin (INT) by software
application. While PB2 can be set as an input pin or a
timer/event counter input pin by software application.
VSS
¾
¾
Negative power supply, GND
V1~V3, C1~C2 ¾
¾
Voltage pump
SEG19/COM3
COM2~COM0
O
1/2 or 1/3 SEG19/COM3 can be set as a segment or a common output
or 1/4 driver for LCD panel by mask option. COM2~COM0 are out-
Duty puts for LCD panel plate.
SEG18~SEG0 O
¾
LCD driver outputs for LCD panel segments
VDD
¾
¾
Positive power supply
OSC2
OSC1
O
I
¾
OSC1 and OSC2 are connected to a 32768Hz crystal for the in-
ternal system clock and WDT source.
IN0
CS0
RS0
CRT0
RT0
I
Oscillation input pin of channel 0
O
Reference capacitor connection pin of channel 0
O
O
¾
Reference resistor connection pin of channel 0
Resistor/capacitor sensor connection pin for measurement of
channel 0
O
Resistor sensor connection pin for measurement of channel 0
IN1
I
Oscillation input pin of channel 1
CS1
RS1
O
O
¾
Reference capacitor connection pin of channel 1
Reference resistor connection pin of channel 1
RT1
O
Resistor sensor connection pin for measurement of channel 1
TEST
I
¾
TEST mode input pin with pull-high resistor.
It disconnects in normal operation.
5
January 18, 2000
Share Link: 