upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 426

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(4) Program example
426
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
EntryProgram:
loop:
add
st.w
movea
ldsr
mov
st.b
st.b
nop
nop
nop
nop
nop
movea
ldsr
trap
movea
ldsr
mov
st.b
st.b
nop
nop
nop
nop
nop
mov
divh
add
jne
ld.w
add
jmp
52
-4, sp
lp, 0[sp]
lo(0x00a0), r0, r10
r10, 5
lo(0x0002), r10
r10, PRCMD[r0]
r10, FLPMC[r0]
lo(0x0020), r0, r10
r10, 5
0x1f
lo(0x00a0), r0, r6
r6, 5
lo(0x08), r6
r6, PRCMD[r0]
r6, FLPMC[r0]
ISETUP, lp
r6, r6
-1, lp
loop
0[sp], lp
4, sp
[lp]
CHAPTER 16 FLASH MEMORY
User’s Manual U12768EJ4V1UD
-- Internal manipulation setup parameter
-- Prepare
-- Save return address
--
-- PSW = NP, ID
--
-- PRCMD = 2
-- VPPDIS = 0, FLSPM = 1
--
-- PSW = ID
-- Device Internal Process
--
-- PSW = NP, ID
-- PRCMD = 8
-- VPPDIS = 1, FLSPM = 0
-- loop time = 52
-- To kill time
-- Decrement counter
--
-- Reload lp
-- Dispose
-- Return to caller