NEC V850E/IA1 mPD703116, User Manual

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CHAPTER 16 FLASH MEMORY (
µµµµ
PD70F3116)
752
User’s Manual U14492EJ3V0UD
(4) Program example
An example of a program in which the entry program is executed as a subroutine is shown below. In this
example, the return address is saved to the stack and then the device internal processing is called. This
program must be located in memory other than the block 0 space and flash memory area.
ISETUP 130 --
Internal manipulation setup parameter
EntryProgram:
add -4, sp -- Prepare
st.w lp, 0[sp] -- Save return address
movea lo(0x00a0), r0, r10 --
ldsr r10, 5 -- PSW = NP, ID
mov lo(0x0002), r10 --
st.b r10, PHCMD[r0] -- PHCMD = 2
st.b r10, FLPMC[r0] -- VPPDIS = 0, FLSPM = 1
nop
nop
nop
nop
nop
movea lo(0x0020), r0, r10 --
ldsr r10, 5 -- PSW = ID
trap 0x1f -- Device Internal Process
movea lo(0x00a0), r0, r6 --
ldsr r6, 5 -- PSW = NP, ID
mov lo(0x08), r6
st.b r6, PHCMD[r0] -- PRCMD = 8
st.b r6, FLPMC[r0] -- VPPDIS = 1, FLSPM = 0
nop
nop
nop
nop
nop
mov ISETUP, lp -- loop time = 130
loop:
divh r6, r6 -- To kill time
add -1, lp -- Decrement counter
jne loop --
ld.w 0[sp], lp -- Reload lp
add 4, sp -- Dispose
jmp [lp] -- Return to caller