HD64336900G Datasheet, PDF (97/408 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

Bit
3 to 0
Initial
Bit Name Value R/W

All 1 
Description
Reserved
These bits are always read as 1
5.2.3 RC Trimming Data Register (RCTRMDR)
RCTRMDR stores the trimming data of the internal RC oscillator frequency.
Bit
7
6
5
4
3
2
1
0
Note:
Initial
Bit Name Value R/W
Description
TRMD7 (0)* R/W Trimming Data
TRMD6 (0)* R/W In the flash memory version, the trimming data is loaded
TRMD5
(0)*
R/W
from the flash memory to this register right after a reset.
These bits are always read as undefined value.
TRMD4
(0)*
R/W _{As for the masked ROM version (under planning), the}
TRMD3 (0)* R/W _{internal RC oscillator frequency can be trimmed by}
TRMD2 (0)* R/W rewriting these bits. The frequency generated in the
TRMD1 0
TRMD0 0
R
internal RC oscillator changes right after rewriting these
bits. These bits are initialized to H'00.
R
Frequency variation is expressed as follows (the TRMD7
bit is a sign bit):
(Min.) H'80 ← H'FC ← H'00 →H'04 → H'7C (Max.)
* These values are initialized while loading the trimming data from the flash memory in
the flash memory version.
5.2.4 Clock Control/Status Register (CKCSR)
CKCSR selects the port C function, controls switching the system clocks, and indicates the system
clock state.
Initial
Bit
Bit Name Value R/W Description
7
PMRC1 0
R/W Port C Function Select 1 and 2
6
PMRC0 0
R/W PMRC1 PMRC0 PC1
PC0
0
0
I/O
I/O
1
0
CLKOUT I/O
0
1
I/O
OSC1 (external clock input)
1
1
OSC2 OSC1
Rev. 1.00, 11/03, page 69 of 376