Panasonic MN103001G/F01K User Manual

Serial Interface

13-5

13.2.2

Block Diagram of General-Purpose Serial Interface

Fig 13-2-1 shows the block diagram for the general-purpose serial interface section.

Fig. 13-2-1 Block Diagram

Transmission buffer

Shift register

Reception buffer read

Transmission buffer write

Start bit detection

Parity bit check

Stop bit check

Start bit

Parity bit addition

Stop bit addition

Transfer

clock

control

IOCLK

Timer 3 underflow

Send break

Transfer clock

Reception buffer

Shift register

Interrupt request

generation

Transmission
interrupt request

Reception
interrupt request

Timer 9 underflow

Serial interface 0

Interrupt mode register

SC0ICR

SC0CTR

Control register

Status register

SC0STR

Transmission

bit counter

Reception bit

counter

SBI0

SBO0

Output control

I/O Port Block

Set the serial signals in
the I/O port control
register. However, some
pins may need to be set
as general-purpose
inputs, depending on the
transmission/reception
procedure.

Open-drain output
in I2C mode

SBT0

Output control