Panasonic MN103001G/F01K User Manual Page 339

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Serial Interface
13-37
13.4.2 Block Diagram of UART Serial Interface
Fig 13-4-1 shows the block diagram for the UART serial interface sections.
Fig. 13-4-1 Block Diagram
Transmission buffer
Shift register
SBO3
SBI3
SBT3
Transmission buffer write
Start bit detection
Parity bit check
Stop bit check
Start bit
Parity bit addition
Stop bit addition
Clock
control
IOCLK
Timer 2 underflow
Send break
Transmission clock
Reception buffer read
Reception buffer
Shift register
Output control
Interrupt request
generation
Transmission
interrupt request
Reception
interrupt request
Timer 8 underflow
IRQ7
Serial interface 3
Transmission bit
counter
SC3ICR
Interrupt mode register
SC3TIM
Timer register
Reception bit
counter
SC3STR
Status register
SC3CTR
Control register
Transmission clock
I/O Port Block
Set the serial signals
in the I/O port
control register.
When using IRQ7,
digital input must be
selected.
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