m30833fjgp Renesas Electronics Corporation., m30833fjgp Datasheet - Page 417
m30833fjgp
Manufacturer Part Number
m30833fjgp
Description
Renesas 16/32-bit Single-chip Microcomputer M16c Family / M32c/80 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M30833FJGP.pdf
(527 pages)
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R
R
M
25.3 CPU Rewrite Mode
e
E
3
. v
J
Table 25.3 Software Commands
2
SRD:
WA:
WD:
BA:
D
X:
xx:
0
Clear Status Register
In CPU rewrite mode, the user ROM area can be rewritten when the CPU executes software commands.
The user ROM area can be rewritten with the microcomputer mounted on a board, without using a parallel
or serial programmer.
Write the rewrite control program to either the user ROM area or the boot ROM area, beforehand. No
program in the flash memory can be executed in CPU rewrite mode. Therefore, transfer rewrite control
program to an area other than flash memory (internal RAM, etc.), and execute.
CPU rewrite mode can be entered when the microcomputer is in single-chip, memory expansion, and boot
mode.
Software commands, listed in Table 25.3, can be used in CPU rewrite mode. Refer to 25.3.3 Software
Command for details of each command.
Read or write commands and data from or to even addresses in the user ROM area, in 16-bit units. The 8
high-order bits (D
Read Array
Read Status Register
Page Program
Block Erase
Erase All Unlocked Block
Read Lock Bit Status
Lock Bit Program
1
9
C
6
:
3 .
B
8 /
Software Command
0
1
3
0
3
J
Data in the SRD register (D
Address to be written (Increment A
16-bit write data
Highest-order block address (A
Lock bit (D
Any even address in the user ROM area (A
8 high-order bits of command code (ignored)
G
4
a
0 -
n
o r
3 .
1
u
, 1
3
p
1
2
(
M
0
6
0
=1: unlock, D
3
6
2
15
C
8 /
Page 394
to D
, 3
M
8
Mode
Write
Write
Write
Write
Write
Write
Write
Write
) are ignored when writing command codes.
6
3
=0: locked)
2
7
C
f o
to D
8 /
First Bus Cycle
0
4
= 0)
3
Address
0
8
)
) T
8
7
to A
X
X
X
X
X
X
X
X
0
by 2 from "00
0
(D
= 0)
xxFF
xxA7
xx70
xx50
xx41
xx20
xx77
xx71
15
Data
to D
16
16
16
16
16
16
16
16
0
)
16
" to "FE
Mode
Read
Write
Write
Write
Write
Read
Second Bus Cycle
16
Address
".)
WA
BA
BA
BA
X
X
(D
xxD0
xxD0
xxD0
15
Data
SRD
WD
D
to D
6
16
16
16
0
)
Mode
Write
25. Flash Memory Version
Third Bus Cycle
Address
WA+2
(D
15
Data
WD
to D
0
)
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