Mitsubishi Electric M32R Series User Manual page 606

Mitsubishi 32-bit risc single-chip microcomputers

Table of Contents

Note : When you selected the clock divider's divide-by ratio = 1, you are subject to limitations that the

baud rate register value you set must be equal to or greater than 7.

Figure 12.7.1 Procedure for UART Receive Initialization

Initial settings for UART

Set SIO Transmit/Receive Mode Register

Set SIO Transmit Control Register

Set SIO Baud Rate Register

Set SIO Interrupt Related Registers

Set the interrupt controller

SIO Receive Interrupt Control Register

Set DMAC related registers

Set input/output port

Operation Mode Register

Initial settings for UART

reception finished

12.7 Receive Operation in UART Mode

• Set register to UART mode

• Set parity (when enabled,

• Set stop bit length

• Set character length

• Select clock divider's divide-by ratio

• Divide-by ratio H'00 to H'FF (Note)

• Cause of Receive Interrupt

Select Register

(receive finished/receive error)

• Interrupt Mask Register

(enable/disable receive interrupts)

(When using interrupt)

(When using DMAC)

select odd/even)