TE
CH
tm
T81L0003B
5. Pin Description
Number
(20-Pin)
1
2
3
4(BK,BD)
4(AK,AD)
5(BK,BD)
5(AK,AD)
6
7
8
9
10
11
12
13
14
15
16
17
18
TM Technology Inc. reserves the right
P. 4
Publication Date: NOV. 2005
to change products or specifications without notice. Revision:A
Name
Type
Description
RST/VPP
P3.0/(RXD)
P3.1/(TXD)
XOUT
OSCR
XIN
STOP
P3.2/(INT0)
P3.3/(INT1)
P3.4/(T0)
GND
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
VCC
I
Reset signal input or programming supply voltage input.
I/O General-purpose I/O pin (Default) or Serial input port.
I/O General-purpose I/O pin (Default) or Serial output port.
O
Crystal oscillator output terminal.
I
RC oscillator external resister connect pin.
I
Crystal oscillator input terminal.
O
Stop RC oscillator network.
I/O General-purpose I/O pin (Default) or External interrupt source 0.
I/O General-purpose I/O pin (Default) or External interrupt source 1.
I/O General-purpose I/O pin (Default) or Timer 0 external input pin.
Ground
I/O General-purpose I/O pin
I/O General-purpose I/O pin
I/O General-purpose I/O pin
I/O General-purpose I/O pin
I/O General-purpose I/O pin
I/O General-purpose I/O pin
I/O General-purpose I/O pin
I/O General-purpose I/O pin
3.3V power supply.