CHAPTER 3 CPU FUNCTION
68
User’s Manual U14492EJ3V0UD
3.3.2
Operation mode specification
The operation mode is specified according to the status of pins MODE0 to MODE2. In an application system fix
the specification of these pins and do not change them during operation. Operation is not guaranteed if these pins
are changed during operation.
(a)
µµµµ
PD703116
MODE2
MODE1
MODE0
Operation Mode
Remark
L
L
L
ROMless mode 0
16-bit data bus
L
L
H
ROMless mode 1
8-bit data bus
L
H
L
Single-chip mode 0
Internal ROM area is allocated
from address 000000H.
L
H
H
Normal operation mode
Single-chip mode 1
Internal ROM area is allocated
from address 100000H.
Other than above
Setting prohibited
(b)
µµµµ
PD70F3116
V
PP
MODE2 MODE1 MODE0
Operation Mode
Remark
0 V
L
L
L
ROMless mode 0
16-bit data bus
0 V
L
L
H
ROMless mode 1
8-bit data bus
0 V
L
H
L
Single-chip mode 0
Internal ROM area is allocated
from address 000000H.
0 V
L
H
H
Normal operation mode
Single-chip mode 1
Internal ROM area is allocated
from address 100000H.
7.8 V
L
H
H/L
Flash memory programming mode
—
Other than above
Setting prohibited
Remark
L: Low-level input
H: High-level input
Содержание V850E/IA1 mPD703116
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