sh6636 SinoWealth Micro-Electronics Corp. Ltd, sh6636 Datasheet - Page 9

• Manufacturer Part Number: sh6636
• Description: Mask 4-bit Microcontroller With Remote Control Carrier Synthesizer
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

7. Remote Control Synthesizer
SH6636 has a built 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 the SH6636 can transmit data with or without a carrier.
The functional block diagram is shown below:
Address
$1D
$13
0: fx = System clock (default)
1: fx = System clock /8
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
fx/12, 1/2 duty
fx/12, 1/3duty
fx/8, 1/2 duty
PPULL
Bit3
fx
-
System clock
CPS
Bit2
Figure 4. Remote Control Functional Block Diagram
-
MOD 8
Figure 5. Remote Carrier Duty
Bit1
CF1
-
CARRIER SYNTHESIZER
MUX
CPS
fx
/8
REMO
No Carrier
Bit0
CF0
/12
9
1/2 duty
1/2 duty
1/3 duty
MUX
CF1
CF0
R/W
R/W
W
REMO
Bit0: REM output data
Bit1-0: Carrier Frequency Control
Bit2: Carrier OSC prescaler
Bit3: Port Pull-up MOS Control
REM
Remarks
SH6636