HT48RA0-5 Holtek Semiconductor, HT48RA0-5 Datasheet - Page 2

• Manufacturer Part Number: HT48RA0-5
• Description: Remote Type 8-Bit OTP MCU
• Manufacturer: Holtek Semiconductor

Block Diagram
Pin Assignment
Pin Description
Rev.1.00
PA0~PA7
PB0~PB4
PB5/OSC2
PB6/OSC1
PB7
PC0/RES
REM/REMDRV
VDD
VSS
Pin Name
I/O
I/O
I/O
I/O
O
Configuration
REMDRV
Option
OSC
RES
Bidirectional 8-bit input/output port with pull-high resistors. Software in-
structions determine if the pin is an NMOS output or Schmitt Trigger input.
Each pin can have a wake-up function if configured as an input pin.
Bidirectional 8-bit input/output port with pull-high resistors. Software in-
structions determine if the pin is an NMOS output or Schmitt Trigger input.
Each pin can have a wake-up function if configured as an input pin. PB5
and PB6 are pin-shared with the external crystal pins named OSC2 and
OSC1 respectively determined by a configuration option.
Bidirectional 1-bit input/output port without a pull-high resistor. Software in-
structions determine if the pin is an NMOS output or Schmitt Trigger input.
This pin has the capability of wake-up when it is configured as an input pin.
PC0 is pin-shared with the external reset pin named RES determined by a
configuration option.
Carrier output dual function pin. REM is a CMOS carrier output pin with an
initial low level after a reset. REMDRV pin is a high sink current NMOS
open drain carrier output pin which will be in a floating condition after a re-
set. The selection of REM or REMDRV is determined by a configuration
option.
Positive power supply
Negative power supply, ground
2
Description
HT48RA0-5
March 23, 2010
www.DataSheet4U.com