
TE
CH
tm
7. Pin Description 
                 T81L0006A/B
TM Technology Inc. reserves the right 
P. 4                
Publication Date: AUG. 2005 
to change products or specifications without notice.                                 Revsion : B
8. Temperature Limit Ratings 
Parameter 
Operating temperature Range 
Storage Temperature Range 
Rating 
-40 to +85 
-55 to +125 
Units 
°C 
°C 
Number 
(24-Pin) 
Number 
(20-Pin) 
Name 
Type 
Description 
1 
1 
P3.0/(RXD) 
I/O General-purpose I/O pin (Default) or Serial input port. 
I/O General-purpose I/O pin (Default) or Serial output port. 
General-purpose I/O pin (Default) or ADC input channel 0. 
2 
2 
P3.1/(TXD) 
3 
3 
P1.0/(ADI0) 
I/O 
4 
4 
P1.1/(ADI1) 
I/O 
General-purpose I/O pin (Default) or ADC input channel 1. 
5 
- 
P3.3/(INT1) 
I/O 
General-purpose I/O pin (Default) or External interrupt source 1. 
6 
5 
GND 
Ground 
7 
- 
P2.3 
I/O 
General-purpose I/O pin. 
8 
6 
P1.2/(ADI2) 
I/O 
General-purpose I/O pin (Default) or ADC input channel 2. 
9 
7 
P1.3/(ADI3) 
I/O 
General-purpose I/O pin (Default) or ADC input channel 3. 
10 
8 
P1.4/(ADI4) 
I/O 
General-purpose I/O pin (Default) or ADC input channel 4. 
11 
9 
P1.5/(ADI5) 
I/O 
General-purpose I/O pin (Default) or ADC input channel 5. 
12 
10 
P1.6/(ADI6) 
I/O 
General-purpose I/O pin (Default) or ADC input channel 6. 
13 
11 
P1.7/(ADI7) 
I/O 
General-purpose I/O pin (Default) or ADC input channel 7. 
14 
12 
P3.2/(INT0) 
I/O 
General-purpose I/O pin (Default) or External interrupt source 0. 
15 
13 
P3.6/(PWM1) 
I/O 
General-purpose I/O pin (Default) or PWM signal output channel 1. 
16 
- 
P2.0/(PWM2) 
I/O 
General-purpose I/O pin (Default) or PWM signal output channel 2. 
17 
14 
P3.7/(VREF) 
I/O 
General-purpose I/O pin (Default) or External reference voltage input 
pin for ADC. 
General-purpose I/O pin. 
18 
- 
P2.1 
I/O 
19 
15 
VCC 
3.3V power supply. 
20 
16 
RST/VPP 
I 
Reset signal input or programming supply voltage input. 
21 
17 
XOUT/(STOP) 
O 
Crystal oscillator output terminal or stop RC oscillator network. 
22 
18 
XIN/(OSC-R) 
I 
Crystal oscillator input terminal or RC oscillator external resister 
connect pin. 
General-purpose I/O pin (Default) or Timer 0 external input pin. 
23 
19 
P3.4/(T0) 
I/O 
24 
20 
P3.5/(T1) 
I/O 
General-purpose I/O pin (Default) or Timer 1 external input pin.