sh6631a SinoWealth Micro-Electronics Corp. Ltd, sh6631a Datasheet - Page 9

• Manufacturer Part Number: sh6631a
• Description: Mask 4-bit Microcontroller
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

6. Remote Control Synthesizer
SH6631A builds-in a carrier synthesizer for infrared or RF remote control circuits.
CPS: Oscillator Range Selection
CF1-0: Carrier Frequency Control:
REMO: REM output pin data control.
With these controls, SH6631A can transmit data with or without a carrier.
The functional block diagram is show as below:
Address
$0D
$13
0: 455K Hz (default)
1: 3.64M Hz
0, 0: No carrier (default)
0, 1: f
1, 0: fx/12, 1/3 duty
1, 1: fx/12, 1/2 duty
X
/8, 1/2 duty
PPULL
Bit3
-
F
F
F
osc
osc
osc
SYSTEM
CLOCK
/12, 1/2 duty
/12, 1/3duty
/8, 1/2 duty
3.6MHz
455KHz
CPS
Bit2
Figure. 5 Remote Control Functional Block Diagram
-
MOD 8
Figure. 6 Remote Carrier Duty
CARRIER SYNTHESIZER
Bit1
CF1
MUX
CPS
-
Fx
1
/8
No Carrier
/12
REMO
1/2 duty
1/2 duty
1/3 duty
Bit0
CF0
9
MUX
CF1
CF0
R/W
R/W
W
REMO
Bit0: REM output data.
Bit1-0: Carrier Frequency Control
Bit2: Carrier OSC pre-scaler
Bit3: Port Pull-up MOS Control
REM
Remarks
SH6631A