HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 587
HD6433044
Manufacturer Part Number
HD6433044
Description
(HD64 Series) Hitachi Single-Chip Microcomputer
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6433044.pdf
(867 pages)
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18.5.3 Erase Block Register 2
Erase block register 2 (EBR2) is an eight-bit register that designates small flash-memory blocks
for programming and erasure. EBR2 is initialized to H'00 by a reset, in the standby modes, when
12 V is applied to V
in EBR2 is set to 1, the corresponding block is selected and can be programmed and erased.
Figure 18-8 shows a block map.
Bit
Initial value
R/W
Note: * The initial value is H'00 in modes 5, 6, and 7 (on-chip flash memory enabled). In modes
Bits 7 to 0—Small Block 7 to 0 (SB7 to SB0): These bits select small blocks (SB7 to SB0) to be
programmed and erased.
Bits 7 to 0
SB7 to SB0
0
1
1, 2, 3, and 4 (on-chip flash memory disabled), this register cannot be modified and is
always read as H'FF.
*
SB7
R/W
7
0
*
Description
Block SB7 to SB0 is not selected
Block SB7 to SB0 is selected
PP
while the V
R/W
SB6
6
0
*
R/W
SB5
PP
5
0
E bit is 0, and when 12 V is not applied to V
*
R/W
SB4
4
0
578
*
R/W
SB3
3
0
*
R/W
SB2
2
0
*
R/W
SB1
1
0
*
PP
R/W
SB0
. When a bit
0
0
(Initial value)
*
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