M16CSLASH29 datasheet(213/499 Pages) RENESAS

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14. Serial I/O

page 189

Table 14.6 Registers to Be Used and Settings in UART Mode

Bit

Function

UiTB

0 to 8

Set transmission data (1)

UiRB

0 to 8

Reception data can be read (1)

OER,FER,PER,SUM Error flag

UiBRG

0 to 7

Set bit rate

UiMR

SMD2 to SMD0

Set these bits to 1002 when transfer data is 7 bits long

Set these bits to 1012 when transfer data is 8 bits long

Set these bits to 1102 when transfer data is 9 bits long

CKDIR

Select the internal clock or external clock

STPS

Select the stop bit

PRY, PRYE

Select whether parity is included and whether odd or even

IOPOL(i=2) (4)

Select the TxD/RxD input/output polarity

UiC0

CLK0, CLK1

Select the count source for the UiBRG register

CRS

_______

Select CTS or RTS to use

TXEPT

Transmit register empty flag

CRD

_______

Enable or disable the CTS or RTS function

NCH

Select TxDi pin output mode

CKPOL

Set to 0

UFORM

LSB first or MSB first can be selected when transfer data is 8 bits long. Set this

bit to 0 when transfer data is 7 or 9 bits long.

UiC1

Set this bit to 1 to enable transmission

Transmit buffer empty flag

Set this bit to 1 to enable reception

Reception complete flag

U2IRS (2)

Select the source of UART2 transmit interrupt

U2RRM (2)

Set to 0

UiLCH (3)

Set this bit to 1 to use UART2 inverted data logic

UiERE (3)

Set to 0

UiSMR

0 to 7

Set to 0

UiSMR2

0 to 7

Set to 0

UiSMR3

0 to 7

Set to 0

UiSMR4

0 to 7

Set to 0

UCON

U0IRS, U1IRS

Select the source of UART0/UART1 transmit interrupt

U0RRM, U1RRM

Set to 0

CLKMD0

Invalid because CLKMD1 is set to 0

CLKMD1

Set to 0

RCSP

_________

Set this bit to 1 to accept as input the UART0 CTS0 signal from the P64 pin

Set to 0

NOTES:

1. The bits used for transmit/receive data are as follows: Bit 0 to bit 6 when transfer data is 7 bits long;

bits 7 to 0 when transfer data is 8 bits long; bit 0 to bit 8 when transfer data is 9 bits long.

2. Set bits 5 and 4 in registers U0C1 and U1C1 to 0. Bits U0IRS, U1IRS, U0RRM and U1RRM are

included in the UCON register.

3. Set bits 7 and 6 in registers U0C1 and U1C1 to 0.

4. Set the bit 7 in registers U0MR and U1MR to 0.

i=0 to 2

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