TX•5B/RX•5B
RX•5B
Pin No.
Symbol
VO2
Description
Inverter 2 output pin for signal amplify
1
2
GND
Negative power supply
Input pin of the encoding signal
Oscillator input pin
3
SI
4
OSCI
5
OSCO
F1, F2,F3,F4
RIGHT
LEFT
Oscillator output pin
6,8,17,15
F1,F2,F3,F4 function output pin
Rightward output pin
7
9
Leftward output pin
Auto Shut•OFF input pin.
10
VT
If VT voltage exceeds 1.4V, all outputs shut off automatically.
Right disable pin.
11
12
13
14
16
18
19
20
21
22
RDB
LDB
Left disable pin.
LRTD
Left/right turbo disable pin
Backward output pin
BACKWARD
FORWARD
TURBO
Forward output pin
TURBO output pin
V
DD
Positive power supply
VI1
VO1
VI2
Inverter 1 input pin for signal amplify
Inverter 1 output pin for signal amplify
Inverter 2 input pin for signal amplify
FUNCTION DESCRIPTION
The TX•5B/RX•5B are a pair of CMOS LSIs designed for remote controlled car applications. The TX•5B/RX•5B
have nine control keys controlling the motions (i.e. forward, backward, rightward, leftward, and trigger1••trigger4
functions and the turbo function) of the remote controlled car.
1. OVER•CURRENT PROTECTION
An Auto Shut•Off mechanism is built•in according to Toy Safety Requirement and effective during over•current
situation in motor driver. The active high input applying to this Auto Shut•Off pin will turn off the motor. (VT pin,
when unused, has to be connected to ground. The transfer point=1.4V)
2. DATA FORMAT
F1="1"
500Hz, 3/4 duty
F0="0"
500Hz, 1/4 duty
3. CODING METHOD
3.1 When a trigger pin is triggered, its data code will correspond to the data format of "F1", while the remaining
pins will have the data format of "F0".
3.2. Data string: start code + data code +parity code + end code
Start code = F1 F1 F1 F1 F0
Data code =
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
REV:2.1
2004.08.03
:
Http www.silan.com.cn
Page 4 of 10
SILAN [ SILAN MICROELECTRONICS JOINT-STOCK ]
