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TE
CH
T81L0010A
8-bit MCU
1. Features
Compatible with MCS-51
Embedded 8K Bytes OTP ROM
256 x 8-bit Internal RAM
15 Programmable I/O Lines for 20-pin
Package
2 16-bit Timer/Counter & 1 16-bit Timer
2 External Interrupt Input
Programmable Serial UART Interface
Low Power Idle & Power-down Modes
Watch-dog Timer
On-chip Crystal & RC Oscillator (Selected
by Bonding Option)
Internal Power-on Reset and External Reset
Supported
SOP20/DIP20 Package
3.3V Operating Voltage
2. General Description
The T81L0010A is 8-bit microcontroller designed
and developed with low power and high speed
CMOS technology. It contains a 8K bytes OTP
ROM, a 256 × 8 RAM, 15 I/O lines, a watchdog
timer, two 16-bit counter/timers, a seven source,
two-priority level nested interrupt structure, a
full duplex UART, and an on-chip oscillator and
clock circuits.
In addition, the T81L0010A has two selectable
modes of power reduction-idle mode and
power-down mode. The idle mode freezes the
CPU while allowing the RAM, timers, serial port,
and interrupt system to continue functioning. The
power-down mode saves the RAM contents but
freezes the oscillator, causing all other chip
functions to be inoperative.
3. Order Information
Part number
T81L0010A-AK
T81L0010A-BK
T81L0010A-AD
T81L0010A-BD
Oscillator type
RC
Crystal
RC
Crystal
Package
20-pin DIP
20-pin DIP
20-pin SOP
20-pin SOP
TM Technology Inc. reserves the right
to change products or specifications without notice.
P. 1
Publication Date: JAN. 2006
Revision:B
tm
TE
CH
T81L0010A
4. Block Diagram
RAM Addr.
Register
RAM
OTP
ROM
B
Register
ACC
Stack
Pointer
TMP2
W DT
TMP1
Program
Address
Register
Buffer
ALU
PC
Incrementer
Interrupt, Serial port,
and Timer Block
PSW
Program
Counter
DPTR
RST
Timing &
Control
Instruction
Register
Port 3
Latch
Port 1
Latch
OSC
Port 3
Drivers
Port 1 Drivers
XTAL1 XTAL2
P3.0 -P3.5, P3.7
P1.0 -P1.7
TM Technology Inc. reserves the right
to change products or specifications without notice.
P. 2
Publication Date: JAN. 2006
Revision:B
tm
TE
CH
T81L0010A
5. Pin Configuration
RST/VPP
(RXD) P3.0
(TXD) P3.1
XOUT
XIN
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VCC
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
P3.7
DIP-20/SOP-20 For Crystal Oscillator
T81L0010A-BK/ T81L0010A-BD
RST/VPP
(RXD) P3.0
(TXD) P3.1
OSCR
STOP
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VCC
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
P3.7
DIP-20/SOP-20 For RC Oscillator
T81L0010A-AK/ T81L0010A-AD
TM Technology Inc. reserves the right
to change products or specifications without notice.
P. 3
Publication Date: JAN. 2006
Revision:B
tm
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
19
20
TE
CH
T81L0010A
6. Pin Description
Name
RST/VPP
P3.0/(RXD)
P3.1/(TXD)
XOUT
OSCR
XIN
STOP
P3.2/(INT0)
P3.3/(INT1)
P3.4/(T0)
P3.5/(T1)
GND
P3.7
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
VCC
Type
I
I/O
I/O
O
I
I
O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Description
Reset signal input or programming supply voltage input.
General-purpose I/O pin (Default) or Serial input port.
General-purpose I/O pin (Default) or Serial output port.
Crystal oscillator output terminal.
RC oscillator external resister connect pin.
Crystal oscillator input terminal.
Stop RC oscillator network.
General-purpose I/O pin (Default) or External interrupt source 0.
General-purpose I/O pin (Default) or External interrupt source 1.
General-purpose I/O pin (Default) or Timer 0 external input pin.
General-purpose I/O pin (Default) or Timer 1 external input pin.
Ground
General-purpose I/O pin
General-purpose I/O pin
General-purpose I/O pin
General-purpose I/O pin
General-purpose I/O pin
General-purpose I/O pin
General-purpose I/O pin
General-purpose I/O pin
General-purpose I/O pin
3.3V power supply.
TM Technology Inc. reserves the right
to change products or specifications without notice.
P. 4
Publication Date: JAN. 2006
Revision:B
tm
TE
CH
T81L0010A
7. Temperature Limit Ratings
Parameter
Operating temperature Range
Storage Temperature Range
Rating
-40 to +85
-55 to +125
Units
°C
°C
8. Electrical Characteristics
D.C Characteristics
Symbol
V
CC
I
CC
I
PD
V
IH
V
IL
V
OH
Conditions
25°C
No load, Vcc=2.5V, 4MHz
Operating Current
No load, Vcc=3.3V, 12MHz
Power Down Current
Vcc=3.3V
V
out
>=V
VOH(MIN.)
Hi-Level input voltage
V
out
<=V
VOL(MIN.)
V
out
>=V
VOH(MIN.)
Low-Level input voltage
V
out
<=V
VOL(MIN.)
I
OH
=-7uA
V
CC
=MIN.
Hi-Level Output voltage
V
I
=V
IH
or
I
OH
=-45uA
V
IL
I
OH
=-70uA
I
OL
=12mA
V
CC
=MIN.
Low-Level Output voltage V
I
=V
IH
or
I
OL
=25mA
V
IL
I
OL
=40mA
Parameter
Operating Voltage
Min
3.0
-
-
-
2.1
-
2.9
2.4
1.9
-
Typ
3.3
-
-
0.1
-
-
-
Max
3.6
1.6
6
1
-
0.6
-
0.2
0.4
0.6
Units
V
mA
mA
uA
V
V
V
V
OL
-
V
A.C Characteristics
Symbol
F
SYS1
F
SYS2
t
RES
Parameter
System Clock 1
(Crystal OSC)
System Clock 2
(RC OSC)
External Reset High Pulse Width
Power ON Start up Time
Conditions
V
CC
=3.3V
V
CC
=3.3V
Min
-
-
-
-
Typ
12
12
10
20
Max
24
-
-
-
Units
MHz
MHz
system cycle
ms
TM Technology Inc. reserves the right
to change products or specifications without notice.
P. 5
Publication Date: JAN. 2006
Revision:B
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