HT49RA0 Ver la hoja de datos (PDF) - Holtek Semiconductor
Número de pieza
componentes Descripción
Fabricante
HT49RA0 Datasheet PDF : 39 Pages
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HT49RA0/HT49CA0
Pin Description
Pin Name I/O
Options
Description
Bidirectional 8-bit input/output port with pull-high resistors. Each bit can
PA0~PA7
I/O
¾
be determined as NMOS output or Schmitt trigger input by software in-
structions.
PB0/INT0
PB1/INT1
PB2/TMR
PB3~PB7
8-bit Schmitt trigger input port with pull-high resistors. Eash bit can be
I
Wake-up
configured as a wake-up input by code option.
Pins PB0, PB1 and PB2 are pin-shared with INT0, INT1 and TMR respec-
tively.
PC0/REM
I/O
Level or Carrier
Pull-high
Level or carrier output pin
PC0 can be set as CMOS output pin or carrier output pin by code option.
V1, V2, C1, C2 I
¾
Voltage pump
VLCD
COM0~COM2
COM3/SEG20
LCD power supply
VLCD should be larger than VDD for correct operation i.e. VLCD ³ VDD.
O
1/2, 1/3 or 1/4 COM3/SEG20 can be set as a segment or as a common output driver for
Duty
LCD panel by options. COM0~COM2 are output for LCD panel plate.
SEG0~SEG11 O
¾
LCD driver outputs for LCD panel segments.
SEG12~SEG19
O
SEG12~SEG19 LCD driver outputs for LCD panel segments.
CMOS output SEG12~SEG19 can be optioned as logical outputs.
OSC1
I
RC
OSC1 connect a resistor to GND for internal system clock.
OSC3
OSC4
Real time clock oscillator. OSC3 and OSC4 are connected to a 32768Hz
I
O
¾
crystal oscillator for timing purpose. It can¢t be used as a system clock. No
capacitor is built-in. If RTC is not selected as fs. OSC3,OSC4 should be
left floating.
RES
I
¾
Schmitt trigger reset input, active low.
VSS
¾
¾
Negative power supply, ground
VDD
¾
¾
Positive power supply
Absolute Maximum Ratings
Supply Voltage ...........................VSS-0.3V to VSS+6.0V
Input Voltage..............................VSS-0.3V to VDD+0.3V
IOL Total ..............................................................150mA
Total Power Dissipation .....................................500mW
Storage Temperature ............................-50°C to 125°C
Operating Temperature...........................-40°C to 85°C
IOH Total............................................................-100mA
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed
in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
D.C. Characteristics
Symbol
Parameter
VDD
IDD
ISTB1
ISTB2
Operating Voltage
Operating Current
(RC OSC)
Standby Current
(*fS=T1)
Standby Current
(*fS=32.768kHz OSC)
Test Conditions
VDD
Conditions
¾
¾
3V No load, fSYS=4MHz
3V
No load, system HALT,
LCD off at HALT
3V
No load, system HALT,
LCD On at HALT, C type
Min.
2.0
¾
¾
¾
Typ.
¾
0.7
0.1
2.5
Ta=25°C
Max. Unit
3.6
V
1.5
mA
1
mA
5
mA
Rev. 1.20
3
October 24, 2007
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