HD64F3644PV Datasheet, PDF (332/551 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 10 Serial Communication Interface
• Choice of internal or external clock as the clock source
When internal clock is selected: SCI3 operates on the baud rate generator clock, and a clock
with the same frequency as the bit rate can be output.
When external clock is selected: A clock with a frequency 16 times the bit rate must be input.
(The on-chip baud rate generator is not used.)
Synchronous Mode
• Data transfer format: Fixed 8-bit data length
• Overrun error (OER) detection during reception
• Choice of internal or external clock as the clock source
When internal clock is selected: SCI3 operates on the baud rate generator clock, and a serial
clock is output.
When external clock is selected: The on-chip baud rate generator is not used, and SCI3
operates on the input serial clock.
Table 10.11 SMR Settings and Corresponding Data Transfer Formats
SMR Setting
Communication Format
Bit 7: Bit 6: Bit 2: Bit 5: Bit 3:
COM CHR MP PE STOP Mode
Multipro- Parity Stop Bit
Data Length cessor Bit Bit Length
00000
1
Asynchronous 8-bit data
No
mode
No
1 bit
2 bits
10
Yes 1 bit
1
2 bits
1
00
7-bit data
No
1 bit
1
2 bits
10
Yes 1 bit
1
2 bits
0
1
*
0
*
1
1
*
0
*
1
Asynchronous 8-bit data
Yes
mode
(multiprocessor
format)
7-bit data
No
1 bit
2 bits
1 bit
2 bits
1
*
0
*
*
Synchronous 8-bit data
No
mode
No No
Legend: * Don’t care
Rev. 6.00 Sep 12, 2006 page 310 of 526
REJ09B0326-0600