H49R50A-1 Datasheet, PDF (4/45 Pages) Holtek Semiconductor Inc – LCD Type 8-Bit MCU

HT49R50A-1/HT49C50-1/HT49C50L
Pin Description
Pin Name I/O
Options
Description
PA0/BZ
PA1/BZ
PA2
PA3/PFD
PA4~PA7
PA0~PA7 constitute an 8-bit bidirectional input/output port with Schmitt trig-
ger input capability. Each bit on port can be configured as wake-up input by
Wake-up
options. PA0~PA3 can be configured as CMOS output or NMOS input/out-
I/O Pull-high or None put with or without pull-high resistor by options. PA4~PA7 are always
CMOS or NMOS pull-high NMOS input/output. Of the eight bits, PA0~PA1 can be set as I/O
pins or buzzer outputs by options. PA3 can be set as an I/O pin or as a PFD
output also by options.
PB0/INT0
PB1/INT1
PB2/TMR0
I
PB3/TMR1
PB4~PB7
PB0~PB7 constitute an 8-bit Schmitt trigger input port. Each bit on port are
with pull-high resistor. Of the eight bits, PB0 and PB1 can be set as input
¾
pins or as external interrupt control pins (INT0) and (INT1) respectively, by
software application. PB2 and PB3 can be set as input pin or as timer/event
counter input pin TMR0 and TMR1 also by software application.
PC0~PC3
I/O
Pull-high or None
CMOS or NMOS
PC0~PC3 constitute a 4-bit bidirectional input/output port with Schmitt trig-
ger input capability. On the port, such can be configured as CMOS output or
NMOS input/output with or without pull-high resistor by options.
V2
I
¾
Voltage pump for HT49R50A-1/HT49C50-1.
LCD power supply for HT49C50L.
VLCD
I
¾
LCD power supply for HT49R50A-1/HT49C50-1.
Voltage pump for HT49C50L.
V1, C1, C2
I
¾
Voltage pump
COM0~COM2
COM3/SEG32
O
1/2, 1/3 or 1/4 SEG32 can be set as a segment or as a common output driver for LCD
Duty
panel by options. COM0~COM2 are outputs for LCD panel plate.
SEG0~SEG31 O
¾
LCD driver outputs for LCD panel segments
OSC1
OSC2
OSC1 and OSC2 are connected to an RC network or a crystal (by options)
I
O
Crystal or RC
for the internal system clock. In the case of RC operation, OSC2 is the out-
put terminal for 1/4 system clock.
The system clock may come from the RTC oscillator. If the system clock co-
mes from RTCOSC, these two pins can be floating.
OSC3
OSC4
Real time clock oscillators. OSC3 and OSC4 are connected to a 32768Hz
I
RTC or
crystal oscillator for timing purposes or to a system clock source (depend-
O System Clock ing on the options).
No built-in capacitor
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..........................V_SS-0.3V to V_SS+6.0V*
Storage Temperature ............................-50°C to 125°C
Operating Temperature ...........................-40°C to 85°C
Supply Voltage ........................V_SS-0.3V to V_SS+2.5V**
Input Voltage..............................V_SS-0.3V to V_DD+0.3V
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 reliabil-
ity.
²*² For HT49R50A-1/HT49C50-1
²**² For HT49C50L
Rev. 2.00
4
November 29, 2005