D12320VF25V Datasheet, PDF (741/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 17 ROM
(2) Programming/Erasing Initialization
The on-chip programming/erasing program to be downloaded includes the initialization program.
The specified period pulse must be applied when programming or erasing. The specified pulse
width is made by the method in which wait loop is configured by the CPU instruction. The
operating frequency of the CPU must be set.
The initial program is set as a parameter of the programming/erasing program which has
downloaded these settings.
(a) Flash programming/erasing frequency parameter (FPEFEQ: general register ER0 of
CPU)
This parameter sets the operating frequency of the CPU.
The operating frequency range of this LSI is 2 MHz to 25 MHz.
Bit
: 31
30
29
28
27
26
25
24
0
0
0
0
0
0
0
0
Initial value : —
—
—
—
—
—
—
—
R/W
:—
—
—
—
—
—
—
—
Bit
: 23
22
21
20
19
18
17
16
0
0
0
0
0
0
0
0
Initial value : —
—
—
—
—
—
—
—
R/W
:—
—
—
—
—
—
—
—
Bit
: 15
14
13
12
11
10
9
8
F15
F14
F13
F12
F11
F10
F9
F8
Initial value : —
—
—
—
—
—
—
—
R/W
: R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
:
7
6
5
4
3
2
1
0
F7
F6
F5
F4
F3
F2
F1
F0
Initial value : —
—
—
—
—
—
—
—
R/W
: R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bits 31 to 16—Reserved: Only 0 may be written to these bits.
Rev.7.00 Feb. 14, 2007 page 707 of 1108
REJ09B0089-0700