T81L0006B TM Technology Inc., T81L0006B Datasheet - Page 21

• Manufacturer Part Number: T81L0006B
• Description: 8-bit A/d Type Mcu
• Manufacturer: TM Technology Inc.

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11. 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.
Port2.0, 2.1, 2.3
external TTL device inputs. When Port2.0, 2.1, 2.3 pins are written as 1’s, these pins are pulled high by the internal pull-ups
and can be used as inputs. As inputs, Port2.0, 2.1, 2.3 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.
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 1 also serves the analog signal input of A/D converter, as listed below:
P1.0 ADI0 (analog input signal channel 0)
P1.1 ADI1 (analog input signal channel 1)
P1.2 ADI2 (analog input signal channel 2)
P1.3 ADI3 (analog input signal channel 3)
P1.4 ADI4 (analog input signal channel 4)
P1.5 ADI5 (analog input signal channel 5)
P1.6 ADI6 (analog input signal channel 6)
P1.7 ADI7 (analog input signal channel 7)
Port2.0, 2.1, 2.3 are a bi-directional I/O port with internal pull-ups. Port2.0, 2.1, 2.3 output buffers can sink/source four
Port 2.0 also serves the output signal of PWM 2.
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)
P3.6 PWM1 (PWM 1 signal output)
P3.7 VREF (external reference voltage input for ADC)
CH
TE
P. 21
Publication Date: JAN. 2006
T81L0006A/B
Revsion : C