t81l0010b TM Technology Inc., t81l0010b Datasheet - Page 11

• Manufacturer Part Number: t81l0010b
• Description: T81l0010b 8-bit Mcu With Embedded Eeprom
• Manufacturer: TM Technology Inc.

9.4. I/O Ports
Port1
device inputs. When port 1 pins are written as 1’s, these pins are pulled high by the internal pull-ups and can be used as
inputs. As inputs, Port 1 pins that are externally being pulled low will source current because of the internal pull-ups.
Port 3
device inputs. When port 3 pins are written as 1’s, these pins are pulled high by the internal pull-ups and can be used as
inputs. As inputs, Port 3 pins that are externally being pulled low will source current because of the internal pull-ups.
TM Technology Inc. reserves the right
to change products or specifications without notice.
tm
Port 1 is an 8-bit bi-directional I/O port with internal pull-ups. Port 1 output buffers can sink/source four external TTL
Port 3 is an 8-bit bi-directional I/O port with internal pull-ups. Port 3 output buffers can sink/source four external TTL
Port 3 also serves the functions of various special features, as listed below:
P3.0 RXD (serial input port)
P3.1 TXD (serial output port)
P3.2 INT0 (external interrupt 0)
P3.3 INT1 (external interrupt 1)
P3.4 T0 (timer 0 external input)
P3.5 T1 (timer 1 external input)
P3.7 General purpose I/O only
CH
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P. 11
Preliminary T81L0010B
Publication Date: JAN. 2006
Revision:A