
24
MB90640A Series
(Continued)
Initial values
0: The initial value for this bit is “0”.
1: The initial value for this bit is “1”.
*: The initial value for this bit is “1” or “0”. (Determined by the level of the MD0 to MD2 pins.)
X: The initial value for this bit is undefined.
–: This bit is not used. The initial value is undefined.
*1: Access prohibited.
*2: This is the only external access area in the area below address 0000FFH. Access this address as an external
I/O area.
*3: Areas marked as “Vacancy” in the I/O map are reserved areas. These areas are accessed by internal access.
No access signals are output on the external bus.
*4: The R/W! symbol in the read/write column indicates that some bits are read-only or write-only. See the resource’s
register list for details.
(Continued)
Address
Name
Register
Read/
write*4,*5
Resource name
Initial value
0000A6H HACR
External address output control
register
W
External bus pin
controller circuits
0000 0000 B
0000A7H ECSR
Bus control signal selection register
W
–00 * 0000 B
0000A8H WDTC
Watchdog timer control register
R/W!
Watchdog timer
XXXXX 1 1 1 B
0000A9H TBTC
Timebase timer control register
R/W!
Timebase timer
1––0 0100 B
0000AAH
to AFH
—
Vacancy
*3
—
0000B0H ICR00
Interrupt control register 00
R/W!
Interrupt
controller
0000 0111 B
0000B1H ICR01
Interrupt control register 01
R/W!
0000 0111 B
0000B2H ICR02
Interrupt control register 02
R/W!
0000 0111 B
0000B3H ICR03
Interrupt control register 03
R/W!
0000 0111 B
0000B4H ICR04
Interrupt control register 04
R/W!
0000 0111 B
0000B5H ICR05
Interrupt control register 05
R/W!
0000 0111 B
0000B6H ICR06
Interrupt control register 06
R/W!
0000 0111 B
0000B7H ICR07
Interrupt control register 07
R/W!
0000 0111 B
0000B8H ICR08
Interrupt control register 08
R/W!
0000 0111 B
0000B9H ICR09
Interrupt control register 09
R/W!
0000 0111 B
0000BAH
—
Vacancy
*3
—
0000BBH ICR11
Interrupt control register 11
R/W!
0000 0111 B
0000BCH
—
Vacancy
*3
—
0000BDH ICR13
Interrupt control register 13
R/W!
0000 0111 B
0000BEH ICR14
Interrupt control register 14
R/W!
0000 0111 B
0000BFH ICR15
Interrupt control register 15
R/W!
0000 0111 B
0000C0H
to FFH
(External area)*2