SH7785 Datasheet, PDF (782/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

15. Clock Pulse Generator (CPG)
FRQMR1
read value
H'122B 244B
H'122B 245B
H'122B 246B
H'122B 248B
H'122B 24BB
CPU
clock
Ick
× 1/2
× 1/2
× 1/2
× 1/2
× 1/2
RAM
clock
Uck
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
Division ratio of divider 2
SuperHyway GDTA DU
clock
clock clock
SHck
GAck DUck
Peripheral DDR
clock
clock
Pck
DDRck
× 1/4
× 1/8 × 1/8 × 1/48
× 1/4
× 1/4
× 1/8 × 1/12 × 1/48
× 1/4
× 1/4
× 1/8 × 1/16 × 1/48
× 1/4
× 1/4
× 1/8 × 1/24 × 1/48
× 1/4
× 1/4
× 1/8 × 1/48 × 1/48
× 1/4
Bus
clock
Bck
× 1/48
× 1/48
× 1/48
× 1/48
× 1/48
Table 15.9 Selectable Combinations of Clock Frequency (CPU Clock: × 1/4, DDR Clock: ×
1/4)
CPU
FRQMR1 read ^clock
value
Ick
H'2225 2448 × 1/4
H'2225 2458 × 1/4
H'2225 2488 × 1/4
H'2225 244B × 1/4
H'2225 245B × 1/4
H'2225 246B × 1/4
H'2225 248B × 1/4
H'2225 24BB × 1/4
H'2226 244A × 1/4
H'2226 246A × 1/4
H'2226 24AA × 1/4
H'2226 244B × 1/4
H'2226 245B × 1/4
H'2226 246B × 1/4
H'2226 248B × 1/4
H'2226 24BB × 1/4
H'2228 2448 × 1/4
RAM
clock
Uck
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
× 1/4
Division ratio of divider 2
SuperHyway GDTA DU
clock
clock clock
SHck
GAck DUck
Peripheral DDR
clock
clock
Pck
DDRck
× 1/4
× 1/8 × 1/8 × 1/24
× 1/4
× 1/4
× 1/8 × 1/12 × 1/24
× 1/4
× 1/4
× 1/8 × 1/24 × 1/24
× 1/4
× 1/4
× 1/8 × 1/8 × 1/48
× 1/4
× 1/4
× 1/8 × 1/12 × 1/48
× 1/4
× 1/4
× 1/8 × 1/16 × 1/48
× 1/4
× 1/4
× 1/8 × 1/24 × 1/48
× 1/4
× 1/4
× 1/8 × 1/48 × 1/48
× 1/4
× 1/4
× 1/8 × 1/8 × 1/36
× 1/4
× 1/4
× 1/8 × 1/16 × 1/36
× 1/4
× 1/4
× 1/8 × 1/36 × 1/36
× 1/4
× 1/4
× 1/8 × 1/8 × 1/48
× 1/4
× 1/4
× 1/8 × 1/12 × 1/48
× 1/4
× 1/4
× 1/8 × 1/16 × 1/48
× 1/4
× 1/4
× 1/8 × 1/24 × 1/48
× 1/4
× 1/4
× 1/8 × 1/48 × 1/48
× 1/4
× 1/4
× 1/8 × 1/8 × 1/24
× 1/4
Bus
clock
Bck
× 1/12
× 1/12
× 1/12
× 1/12
× 1/12
× 1/12
× 1/12
× 1/12
× 1/16
× 1/16
× 1/16
× 1/16
× 1/16
× 1/16
× 1/16
× 1/16
× 1/24
Rev.1.00 Jan. 10, 2008 Page 752 of 1658
REJ09B0261-0100