HT47R20A-1 Ver la hoja de datos (PDF) - Holtek Semiconductor
Número de pieza
componentes Descripción
Fabricante
HT47R20A-1 Datasheet PDF : 41 Pages
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Pin Assignment
HT47R20A-1/HT47C20-1
P A 0 /B Z
P A 1 /B Z
P A 2 /IR
P A 3 /P F D
PA4
PA5
PA6
PA7
P B 0 /IN T
PB1
P B 2 /T M R
PB3
NC
NC
NC
NC
64 63 62 616059 585756 5554 5352 51 5049
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
H T 4 7 R 2 0 A -1 /H T 4 7 C 2 0 -1
41
9
6 4 L Q F P -A
40
10
39
11
38
12
37
13
36
14
35
15
34
1 61 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2 3 3
SEG 3
SEG 4
SEG 5
SEG 6
SEG 7
SEG 8
SEG 9
S E G 10
S E G 11
S E G 12
S E G 13
S E G 14
S E G 15
S E G 16
S E G 17
S E G 18
Pad Description
Pad Name I/O Option
Function
PA0/BZ
PA1/BZ
PA2/IR
PA3/PFD
PA4~PA7
Bidirectional 8-bit input/output port. The low nibble of the PA can be configured
Wake-up as CMOS output or NMOS output with or without pull-high resistors (determined
Pull-high by pull-high option). NMOS output can be configured as Schmitt trigger input with
I/O or None or without pull-high resistors. Each bit of NMOS output can be configured as
CMOS or wake up input by options. Of the eight bits, PA0~PA1 can be set as I/O pins or
NMOS buzzer outputs by options. PA2 can be set as an I/O pin or an IR carrier output
also by options. PA3 can be set as an I/O pin or a PFD output also by options.
PB0/INT
PB1
PB2/TMR
PB3
4-bit Schmitt trigger input port. The PB is configured with pull-high resistors. Of
I
¾
the four bits, PB0 can be set as an 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 also by software application.
IN0
CS0
RS0
CRT0
RT0
I
Oscillation input pin of channel 0
O
Reference capacitor connection pin of channel 0
O
¾
Reference resistor connection pin of channel 0
O
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
COM0~COM2
COM3/SEG19
O
1/2, 1/3 or SEG19/COM3 can be set as segment or common output driver for LCD panel by
1/4 Duty options. COM0~COM2 are outputs for LCD panel plate.
SEG0~SEG18 O
V1, V2, C1, C2 ¾
VLCD
I
OSC2
O
OSC1
I
¾
LCD driver outputs for LCD panel segments
¾
Voltage pump
¾
LCD power supply
Crystal or OSC1 and OSC2 are connected to an RC network or a crystal (by options) for the in-
RC ternal system clock.
Rev. 1.80
3
June 23, 2008
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