三合微科股½有限公司
S
AM
H
OP
Microelectronics Corp.
SM-T2/SM-R2
REMOTE CONTROLLER
WITH FIVE FUNCTION
GENERAL DESCRIPTION
The SM-T2 / SM-R2 is a pair of CMOS
chip, it was designed for remote controlled
car applications.
The SM-T2 / SM-R2 has five control keys
for controlling the motions ( i.e. forward,
backward rightward, leftward and the turbo
function ) of the remote controller car.
FEATURES
* Power supply : 2.4V - 5.0V
* Low stand-by current
* Five functions control
* Auto-power-off function for SM-T2
* Few external components are needed
APPLICATION
* Remote control car etc.
PIN ASSIGNMENTS (TOP VIEW)
RIGHTB
NC
GND
BACKWARDB
FORWARDB
TURBOB
SC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
LEFTB
NC
OSCI
OSCO
PC
VDD
SO
VO2
GND
SI
OSCI
OSCO
RIGHT
LEFT
RDB
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VI2
VO1
VI1
VDD
TURBO
FORWARD
BACKWARD
LDB
SM-T2
SM-R2
Page 1
V2.0 Mar 8,2002
三合微科股½有限公司
S
AM
H
OP
Microelectronics Corp.
SM-T2/SM-R2
REMOTE CONTROLLER
WITH FIVE FUNCTION
BLOCK DIAGRAM
SM-T2
OSCI
OSCILLATOR
OSCO
TESTB
TIMING
GENERATOR
RIGHTB
LEFTB
TURBOB
FORWARDB
FORWARDB
LATCH
CIRCUIT
ENCODING
CIRCUIT
PC
LOGIC
SO
SC
SM-R2
OSCI
OSCILLATOR
OSCO
TIMING
GENERATOR
COUNTER
SI
AMP
DECODING
CIRCUIT
PLA
RIGHT
VI1
VO1
CONTROL
LOGIC
VO2
LATCH
LEFT
TURBO
BACKWARD
FORWARD
VI2
LDB
RDB
Page 2
V2.0 Mar 8,2002
三合微科股½有限公司
S
AM
H
OP
Microelectronics Corp.
SM-T2/SM-R2
REMOTE CONTROLLER
WITH FIVE FUNCTION
PIN DESCRIPTION
SM-T2
Pin No.
1
2, 13
3
4
5
6
7
8
9
10
11
12
14
Pin Name
RIGHTB
NC
GND
BACKWARDB
FORWARDB
TURBOB
SC
SO
VDD
PC
OSCO
OSCI
LEFTB
Positive power supply
Power control output pin
Oscillator output pin
Oscillator input pin
The leftward function will be selected, if this pin is connected to GND
Negative power supply
The backward function will be selected, if this pin is connected to GND
The forward function will be selected, if this pin is connected to GND
The turbo function will be selected, if this pin is connected to GND
Output pin of the encoding signal with carrier frequency
Description
The rightward function will be selected, if this pin is connected to GND
SM-R2
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
VO2
GND
SI
OSCI
OSCO
RIGHT
LEFT
RDB
LDB
BACKWARD
FORWARD
TURBO
VDD
VI1
VO1
VI2
Leftward function disable, if this pin is connected to GND
Backward output pin
Forward output pin
TURBO output pin
Positive power supply
Inverter 1 input pin for power amplify
Inverter 1 output pin for power amplify
Inverter 2 input pin for power amplify
Negative power supply
Input pin of the encoding signal
Oscillator input pin
Oscillator output pin
Rightward output pin
Leftward output pin
Description
Inverter 2 output pin for power amplify
Page 3
VER 1.0, DEC. 2000
三合微科股½有限公司
S
AM
H
OP
Microelectronics Corp.
SM-T2/SM-R2
REMOTE CONTROLLER
WITH FIVE FUNCTION
FUNCTION DESCRIPTION
1. Code Format
Encode Rule (Bit Format)
1KHz
W1
1KHz 50% Duty cycle
W2
500Hz 75% Duty cycle
2. Data Format
W2 W2 W2 W2 (n) x W1 W2 W2 W2 W2 (n) x W1 W2 W2 W2 W2
No. of Function Code (n) W1
4
10
16
22
28
34
40
46
52
58
64
Forward
Forward & Turbo
Turbo
Turbo & Forward & Left
Turbo & Forward & Right
Backward
Backward & Right
Backward & Left
Left
Right
Function Key
Decode Result
End Code
Forward
Forward
Turbo
Forward & Left
Forward & Right
Backward
Backward & Right
Backward & Left
Left
Right
W2
1
W2
2
W2
3
W2
4
••••••
W2
W1
n-th
W2
W2
W2
W1
W1 W1 W1 W1
1
2
3
4
function code
1 word
start code
Page 4
V2.0 Mar 8,2002
三合微科股½有限公司
S
AM
H
OP
Microelectronics Corp.
SM-T2/SM-R2
REMOTE CONTROLLER
WITH FIVE FUNCTION
3. Encode/Decode Timing
(A)
Any function key
Encode output
1st word
2nd word
3rd word
1 2 3 4 5 6 7 8
end code
Decode output
9ms
9ms
(B)
SI
8 msec
••••••
(n) W1
8 msec
1ms
Decode output
T
T=17ms+(nW1)x1ms
Page 5
V2.0 Mar 8,2002
微控制器 MCU