HD64F7051SFJ20V Datasheet, PDF (538/843 Pages) Renesas Technology Corp – Hardware Manual Renesas 32-Bit RISC

Section 16 Pin Function Controller (PFC)
16.3.15 CK Control Register (CKCR)
CK control register (CKCR) is a 16-bit readable/writable register being used for controlling clock
output from CK terminal.
CKCR is initialized to H'FFFE by a power-on reset and in hardware standby mode. It is not
initialized in software standby mode or sleep mode.
Bit: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
— — — — — — — — — — — — — — — CKLO
Initial value: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
R/W: R R R R R R R R R R R R R R R R/W
Bits 15 to 1—Reserved: This bit is always read as 1, and should only be written with 1.
Bit 0—CK low fixed bit (CKLO): This bit is used for selecting the internal clock output or low
level output for output from the CK terminal.
Bit 0:
CKLO
0
1
Description
Selects the internal clock for the CK terminal output
Always selects the low level for the CK terminal output
(Initial value)
Rev. 5.00 Jan 06, 2006 page 516 of 818
REJ09B0273-0500