Renesas 16-bit single-chip microcomputer, M16C/6NL, M16C/6NN - page 312

Rev.1.02 Jul 01, 2005 page 296 of 314
REJ09B0126-0102
M16C/6N Group (M16C/6NL, M16C/6NN) 22. Usage Precaution
Under development
This document is under development and its contents are subject to change.
22.11.3 SI/Oi (i = 3 to 6) (1)
The SOUTi default value which is set to the SOUTi pin by the SMi7 in the SiC register bit approximately
10ns may be output when changing the SMi3 bit in the SiC register from “0” (I/O port) to “1” (SOUTi output
and CLKi function) while the SMi2 bit in the SiC register to “0” (SOUTi output) and the SMi6 bit is set to “1”
(internal clock). And then the SOUTi pin is held high-impedance.
If the level which is output from the SOUTi pin is a problem when changing the SMi3 bit from “0” to “1”, set
the default value of the SOUTi pin by the SMi7 bit.
NOTE:
1.SI/O5 and SI/O6 are only in the 128-pin version.