Renesas Asynchronous SH7145F Manual de usuario descargar pdf (Pagina 9)

SH7145F

Synchronous Serial Data Transmission

REJ06B0352-0100O/Rev.1.00 March 2004 Page 9 of 16

Bit

Set Value Function

SMR_0 MP 0 Multiprocessor mode (enabled in asynchronous mode only)

Disabled in task example because synchronous mode is used

CKS1

CKS2

Clock select 1, 0

When value is 00, Pφ clock selected using on-chip baud rate generator

as clock source

BRR_0 H'40 Bit rate register 0

8-bit register for adjusting bit rate

SDCR_0 H'F2 Serial direction control register 0

DIR bit (bit 3) selects LSB-first or MSB-first

In task example, DIR = 0 (LSB-first)

SSR_0 H'xx Serial status register 0

Comprises SCI0 status flag and transmit and receive multiprocessor bits

Only 0 may be written to the status flag, to clear it

TDRE * Transmit data register empty (status flag)

RDRF * Receive data register full (status flag)

ORER * Overrun error (status flag)

FER * Framing error (status flag)

PER * Parity error (status flag)

TEND * Transmit end (status flag)

MPB 0 Multiprocessor bit

MPBT 0 Multiprocessor bit transfer

PA2MD1

PA2MD0

Port A control register L2

Function setting for port A multiplex pin (SCK0)

PACRL2

PA1MD1

PA1MD0

Port A control register L2

Function setting for port A multiplex pin (TXD0)

*: Can only be cleared to 0. Setting to 1 is performed by hardware.

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Renesas Asynchronous SH7145F Manual de usuario Pagina 9