Datasheet

Section 5 Clock Pulse Generator
Rev. 3.00 Sep. 10, 2007 Page 73 of 528
REJ09B0216-0300
5.2.1 RC Control Register (RCCR)
RCCR controls the on-chip oscillator.
Bit Bit Name
Initial
Value
R/W Description
7 RCSTP 0 R/W On-Chip Oscillator Standby
The on-chip oscillator standby state is entered by setting
this bit to 1.
6 FSEL 1 R/W Frequency Select for On-chip Oscillator
0: 16 MHz
1: 20 MHz
5 VCLSEL 0 R/W Power Supply Select for On-chip Oscillator
0: Selects VBGR
1: Selects VCL
When the VCL power is selected, the accuracy of the on-
chip oscillator frequency cannot be guaranteed.
4 to 2  All 0  Reserved
These bits are always read as 0.
1
0
RCPSC1
RCPSC0
1
0
R/W
R/W
Division Ratio Select for On-chip Oscillator
The division ratio of R
OSC
changes right after rewriting this
bit.
These bits can be written to only when the CKSTA bit in
CKCSR is 0.
0x: R
OSC
(not divided)
10: R
OSC
/2
11: R
OSC
/4