M32CSLASH8B datasheet(220/406 Pages) RENESAS

220 / 406 page

Under development

M32C/8B Group

17. Serial Interfaces

Preliminary specification

Specifications in this manual are tentative and subject to change.

REJ09B0450-0050 Rev.0.50 Oct 31, 2008

Page 203 of 385

Figure 17.7

U0C0 to U4C0 Registers

b7 b6 b5 b4

Symbol

U0C0 to U2C0

U3C0, U4C0

Address

036Ch, 02ECh, 033Ch

032Ch, 02FCh

After Reset

0000 1000b

Function

Bit Symbol

Bit Name

CRS

CLK1

CLK0

NCH

CKPOL

0: Data in the transmit shift register

(during transmit operation)

1: No data in the transmit shift register

(transmit operation is completed)

Transmit shift register

empty flag

CLK polarity select bit

UiBRG count source select

bits(1)

CRD

TXEPT

0: CTS function enabled

1: CTS function disabled

0: Transmit data output at the falling edge and

receive data input at the rising edge of the

serial clock

1: Transmit data output at the rising edge and

receive data input at the falling edge of the

serial clock

CTS function disable bit

0: TXDi/SDAi and SCLi are CMOS output ports

1: TXDi/SDAi and SCLi are N-channel open

drain output ports

Data output select bit(3)

Bit order select bit(4)

0 : LSB first

1 : MSB first

UFORM

UARTi Transmit/Receive Control Register 0 (i = 0 to 4)

CTS function select bit

Enabled when CRD = 0

0: CTS function selected

1: CTS function not selected

b1 b0

0 0: f1 selected

0 1: f8 selected

1 0: f2n selected(2)

1 1: Do not set to this value

NOTES:

1. Set the UiBRG register after setting bits CLK1 and CLK0.

2. Bits CNT3 to CNT0 in the TCSPR register select no division (n = 0) or divide-by-2n (n = 1 to 15). To select f2n, set the

CST bit in the TCSPR register to 1 before setting bits CLK1 and CLK0 to 10b.

3. P7_0/TXD2, P7_1/SCL2 are N-channel open drain output ports. They cannot be set as CMOS output ports even if the NCH bit

is set to 0.

4. The UFORM bit is enabled when bits SMD2 to SMD0 in the UiMR register are set to 001b (clock synchronous mode) or 101b

(UART mode, 8-bit data length). Set the UFORM bit to 1 when bits SMD2 to SMD0 are set to 010b (I 2C mode), or to 0 when bits

SMD2 to SMD0 are set to 100b (UART mode, 7-bit data length) or 110b (UART mode, 9-bit data length).

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