HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 414

• Manufacturer Part Number: HD64F7050
• Description: 32-Bit RISC Microcomputer SuperH RISC engine Family/
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 13 Serial Communication Interface (SCI)
13.3
13.3.1
For serial communication, the SCI has an asynchronous mode in which characters are
synchronized individually, and a clock synchronous mode in which communication is
synchronized with clock pulses. Asynchronous/clock synchronous mode and the transmission
format are selected in the serial mode register (SMR), as shown in table 13.8. The SCI clock
source is selected by the C/A bit in the serial mode register (SMR) and the CKE1 and CKE0 bits
in the serial control register (SCR), as shown in table 13.9.
Asynchronous Mode:
Clock Synchronous Mode:
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Data length is selectable: seven or eight bits.
Parity and multiprocessor bits are selectable, as well as the stop bit length (one or two bits).
These selections determine the transmit/receive format and character length.
In receiving, it is possible to detect framing errors (FER), parity errors (PER), overrun errors
(ORER), and the break state.
An internal or external clock can be selected as the SCI clock source.
The communication 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 SCI clock source.
When an internal clock is selected, the SCI operates using the on-chip baud rate generator
clock, and can output a clock with a frequency matching the bit rate.
When an external clock is selected, the external clock input must have a frequency 16 times
the bit rate. (The on-chip baud rate generator is not used.)
When an internal clock is selected, the SCI operates using the on-chip baud rate generator
clock, and outputs a synchronous clock signal to external devices.
When an external clock is selected, the SCI operates on the input synchronous clock. The
on-chip baud rate generator is not used.
Operation
Overview