M30620FCAFP datasheet(411/615 Pages) RENESAS

411 / 615 page

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

2-94

UART

Figure 2.5.15. Set-up procedure of transmission in UART mode (used for SIM interface) (1)

Setting UART2 transmit/receive control register 0

UART2 transmit/receive control register 0 [Address 037C16]

U2C0

Must always be “0” in UART mode

BRG count source select bit

0 0 : f1 is selected

0 1 : f8 is selected

1 0 : f32 is selected

1 1 : Must not be set

b1 b0

Valid when bit 4 = “0”

CTS/RTS disable bit

1 : CTS/RTS function disabled

Transmit register empty flag

0 : Data present in transmit register (during transmission)

1 : No data present in transmit register (transmission completed)

Transfer format select bit

Must be “0” (LSB first) in direct format

Continued to the next page

Must always be “0” in UART mode

Setting UART2 transmit/receive mode register

UARTi transmit/receive mode register [Address 037816]

U2MR

Stop bit length select bit

0 : One stop bit

Odd/even parity select bit (Valid when bit 6 = “1”)

Must be “1” (even parity) in direct format

Parity enable bit

1 : Parity enabled

TXD, RXD I/O polarity reverse bit

Usually set to “0”

Serial I/O mode select bit

1 0 1 : Transfer data 8 bits long

b2 b1 b0

01 1

Setting UART2 transmit/receive control register 1

UART2 transmit/receive control register 1 [Address 037D16]

U2C1

UART2 transmit interrupt cause select bit

1 : Transmission completed (TXEPT = 1)

Error signal output enable bit

1 : Output enabled

Must always be “0” in UART mode

Data logic select bit

Must be “0” (no reverse) in direct format

M30620FCAFP Datasheet(PDF) 411 Page - Renesas Technology Corp

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