HT46R71D-1 Holtek Semiconductor, HT46R71D-1 Datasheet - Page 3

• Manufacturer Part Number: HT46R71D-1
• Description: Dual Slope A/D Type MCU
• Manufacturer: Holtek Semiconductor

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Pin Assignment
Pin Description
Rev. 1.00
PA0/BZ
PA1/BZ
PA2
PA3
PA4/TMR0
PA5/TMR1
PA6/INT
PA7
PB0~PB1
VLCD
COM0~COM2
SEG0~SEG9
VOBGP
VOREG
VOCHP
CHPC1
CHPC2
Pin Name
AO
I/O
I/O
I/O
O
O
O
O
I
1/2 or 1/3 Duty COM0~COM2 are the common outputs for the LCD panel plate.
Wake-up
Segment
Options
Pull-high
Pull-high
Buzzer
Output
Bidirectional 8-bit input/output port. Each individual bit on this port can
be configured to have a wake-up function using a configuration option.
Software instructions determine if the pin is a CMOS output or Schmitt
trigger input. Configuration options determine which pins on this port
have pull-high resistors. The BZ, BZ, TMR0, TMR1 and INT are
pin-shared with PA0, PA1, PA4, PA5 and PA6 respectively.
Bidirectional 2-bit input/output port. Software instructions determine if
the pin is a CMOS output or Schmitt trigger input. Configuration op-
tions determine which pins on this port have pull-high resistors.
LCD power supply
LCD driver outputs for the LCD panel segments.
Bandgap voltage output pin. (for internal use)
Regulator output 3.3V
Charge pump output (a capacitor is required to be connected)
Charge pump capacitor, positive
Charge pump capacitor, negative
3
Description
HT46R71D-1
May 14, 2007