Clock-Stop Register 00 (Clkstp00) (Sh7750R Only) - Hitachi SH7750 Hardware Manual

Bit 1 (SH7750S and SH7750R)—Module Stop 6 (MSTP6): Specifies that the clock supply to
the store queue (SQ) in the cache controller (CCN) is stopped. Setting the MSTP6 bit to 1 stops
the clock supply to the SQ, and the SQ functions are therefore unavailable.
Bit 1: MSTP6
0
1
Bit 0 (SH7750S and SH7750R)—Module Stop 5 (MSTP5): Specifies stopping of the clock
supply to the user break controller (UBC) among the on-chip peripheral modules. See section
20.6, User Break Controller Stop Functions for how to set the clock supply.
Bit 0: MSTP5
0
1
9.2.5

Clock-Stop Register 00 (CLKSTP00) (SH7750R Only)

Clock-stop register 00 (CLKSTP00) controls the operation clock for peripheral modules. To
resume supply of the clock signal, write a 1 to the corresponding bit in the CLKSTPCLR00
register. Writing a 0 to the CLKSTP00 register does not affect the register's value. The
CLKSTP00 register is a 32-bit register that can be read from or written to. It is initialized to
H'0000 0000 by a power-on reset, but not by a manual reset or when the device enters standby
mode.
Bit:
31 30
— —
Initial value:
0 0
R/W:
R R
Bit:
15 14
— —
Initial value:
0 0
R/W:
R R
Bits 31 to 2—Reserved: Any data written to these bits should always be 0. These bits are always
read as 0.
Rev. 6.0, 07/02, page 228 of 986
Description
SQ operating
Clock supply to SQ stopped
Description
UBC operating
Clock supply to UBC stopped
29 28 27 26
— — — —
0 0 0 0
R R R R
13 12 11 10
— — — —
0 0 0 0
R R R R
25 24 23 22
— — — —
0 0 0 0
R R R R
9 8 7 6
— — — —
0 0 0 0
R R R R
(Initial value)
(Initial value)
21 20 19 18
— — — —
0 0 0 0
R R R R
5 4 3 2
— — — —
CSTP1 CSTP0
0 0 0 0
R R R R R/W R/W
17 16
— —
0 0
R R
1 0
0 0