Toshiba H1 Series - Manual (Page 32)

TMP92CZ26A
92CZ26A-29
The following is a setting example for PLL0-starting and PLL0-stopping.
(Example-1) PLL0-starting
PLLCR0 EQU 10E8H
PLLCR1 EQU 10E9H
LD (PLLCR1),1XXXXXXXXB ; Enables PLL0 operation and starts lock-up
.
LUP: BIT 5,(PLLCR0) ;
JR Z,LUP ;
Detects end of lock-up
LD (PLLCR0), X1XXXXXXB ; Changes fc from 10 MHz to 60 MHz.
X: Don't care
Counts up by f OSCH
During lock-up
PLL output: f PLL
Lockup timer
System clock f
SYS
Starts PLL0 operation and
Starts lock-up.
Ends of lock-up
Changes from 10MHz to 60MHz.
After lock-up
(Example-2) PLL0-stopping
PLLCR0 EQU 10E8H
PLLCR1 EQU 10E9H
LD (PLLCR0),X0XXXXXXB ; Changes fc from 60 MHz to10 MHz.
LD (PLLCR1),0XXXXXXXB ; Stop PLL
X: Don't care
PLL0 output: f PLL
System clock f SYS
Stops PLL0 operation .
Changes from 60MHz to 10 MHz.
Note) PLL1 operates as well.