Fujitsu MB91F109 FR30 Hardware Manual page 134

CHAPTER 3 CLOCK GENERATOR AND CONTROLLER
CHC_1:
call VCO_RUN
PLL_SET_END:
ld @R15+, PS
; ************************************************************
; VCO Setting
; ************************************************************
VCO_RUN:
st R3, @-R15
ldi:8 #PCTR _MASK, R3
and R5, R3
beq LOOP_100US_END
bandl #0111B, @r1
st R2, @-R15
ldi:20 #0x15E, R2
WAIT_100US:
add2 #(-1), R2
bne WAIT_100US
LOOP_100US_END:
ld @R15+, R2
ld @R15+, R3
ret
110
; pop processor status
; push R3
; PCTR_MASK =0000 1000 b
; PTCR->VSTP=1 ?
; if VSTP = 0 return
; set VSTP = 0
; push R2 for Loop counter
; wait 100 S
; 100us = 160ns(6.25MHz) * 7 * 100 (2BC)cycle
; 2BCh/2 = 15Eh (if cache on)
;
; Pop R2
; Pop R3