SH7050 Datasheet, PDF (240/841 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH RISC engine Family/

Section 10 Advanced Timer Unit (ATU)
10.2.3 Prescaler Register 1 (PSCR1)
Prescaler register 1 (PSCR1) is an 8-bit register. The ATU has one PSCR1 register.
Bit: 7
6
5
4
3
2
1
0
—
—
— PSCE PSCD PSCC PSCB PSCA
Initial value: 0
0
0
0
0
0
0
0
R/W: R
R
R
R/W R/W R/W R/W R/W
PSCR1 is an 8-bit readable/writable register that enables the first-stage counter clock φ' input to
each free-running counter (TCNT0 to TCNT9) and down-counter (DCNT10A to DCNT10H) to be
set to any value from φ/1 to φ/32.
Input counter clock φ' is determined by setting PSCA to PSCE: φ' is φ/1 when the set value is
H'00, and φ/32 when H'1F.
PSCR1 is initialized to H'00 by a power-on reset, and in hardware standby mode and software
standby mode.
The internal clock φ' set with this register can undergo further second-stage scaling to create clock
φ" for channels 1 to 10, the setting being made in the timer control register (TCR).
Rev. 5.00 Jan 06, 2006 page 220 of 818
REJ09B0273-0500