HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 771
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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19.4
19.4.1
For serial communication, the SCIF has an asynchronous mode in which characters are
synchronized individually, and a synchronous mode in which communication is synchronized with
clock pulses. The SCIF has a 16-byte FIFO buffer for both transmit and receive operations,
reducing the overhead of the CPU, and enabling continuous high-speed communication.
Moreover, it has RTS and CTS signals as modem control signals. The transmission format is
selected in the serial mode register (SCSMR). The SCIF clock source is selected by the
combination of the CKE1 and CKE0 bits in the serial control register (SCSCR).
Asynchronous Mode:
• Data length is selectable: 7 or 8 bits
• Parity bit is selectable. So is the stop bit length (1 or 2 bits). The combination of the preceding
• In receiving, it is possible to detect framing errors, parity errors, receive FIFO data full,
• The number of stored data bytes is indicated for both the transmit and receive FIFO registers.
• An internal or external clock can be selected as the SCIF clock source.
Synchronous Mode:
• The transmission/reception format has a fixed 8-bit data length.
• In receiving, it is possible to detect overrun errors (ORER).
• An internal or external clock can be selected as the SCIF clock source.
selections constitutes the communication format and character length.
overrun errors, receive data ready, and breaks.
When an internal clock is selected, the SCIF operates using the on-chip baud rate
When an external clock is selected, the external clock input must have a frequency 16 times
When an internal clock is selected, the SCIF operates using the on-chip baud rate
When an external clock is selected, the SCIF operates on the input serial clock. The on-
generator.
the bit rate. (The on-chip baud rate generator is not used.)
generator, and outputs a serial clock signal to external devices.
chip baud rate generator is not used.
Operation
Overview
Section 19 Serial Communication Interface with FIFO (SCIF)
Rev. 4.00 Sep. 14, 2005 Page 721 of 982
REJ09B0023-0400
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