Structure Of Remote-Control Transmission Frequency Generator; Figure 13.2-1 Block Diagram Of Remote-Control Transmission Frequency Generator - Fujitsu F2MC-8L Series Hardware Manual

13.2 Structure of Remote-control Transmission Frequency
Generator
The remote-control transmission frequency generator consists of the following five
blocks:
• Count clock selector
• 6-bit counter
• Comparator
• Remote-control transmission frequency control register 1 (RCR1)
• Remote-control transmission frequency control register 2 (RCR2)
Block Diagram of Remote-control Transmission Frequency Generator

Figure 13.2-1 Block Diagram of Remote-control Transmission Frequency Generator

RCK1 RCK0 HSC5 HSC4 HSC3 HSC2 HSC1 HSC0
Count clock
selector
× 0.5
1 t × 1
inst
× 8
× 32
Remote-control transmission
frequency control register 2 (RCR2)
t : Instruction cycle
t
ins
Count clock selector
The count clock selector is the circuit for selecting four different internal count clocks for up-
counting by the 6-bit counter.
6-bit counter
The 6-bit counter increments the count in synchronization with the count clock selected by the

13.2 Structure of Remote-control Transmission Frequency Generator

Internal data bus
Value compared for "H" width
6
6-bit counter
CLK
Comparator
CLEAR
RCEN — SCL5 SCL4 SCL3 SCL2 SCL1 SCL0
Internal data bus
Remote-control transmission
frequency control register 1 (RCR1)
Buzzer output
Buzzer output
Remote-control
enable signal
transmission
frequency output
Remote-control transmission
frequency output enable signal
6
Value compared for cycle
Pin
P37/BZ/RCO
281