M16C26 Datasheet, PDF (227/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
Appendix Standard Serial I/O Mode 2 (Flash Memory Version)
M16C/26 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
How frequency is identified
When “0016” data is received 16 times from a peripheral unit at a baud rate of 9,600 bps, the value of the
bit rate generator is set to match the operating frequency (2 - 20 MHz). The highest speed is taken from
the first 8 transmissions and the lowest from the last 8. These values are then used to calculate the bit
rate generator value for a baud rate of 9,600 bps.
Baud rate cannot be attained with some operating frequencies. Table 1.23.1 gives the operation fre-
quency and the baud rate that can be attained for.
Table 1.23.1 Operation frequency and the baud rate
Operation frequency
(MHZ)
Baud rate
9,600bps
Baud rate
19,200bps
20MHZ
16MHZ
12MHZ
11MHZ
10MHZ
8MHZ
7.3728MH Z
6MHZ
5MHZ
4.5MHZ
4.194304MH Z
4MHZ
3.58MHZ
3MHZ
2MHZ
–
: Communications possible
– : Communications not possible
Baud rate
38,400bps
–
–
–
–
–
–
Baud rate
57,600bps
–
–
–
–
–
–
–
–
Renesas Technology Corp.
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