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-3-
XIN input is enable when XIN control port is at
"1:
MSB
• When the set power source is turned on and
when the reset key is pressed, a high pulse is
supplied to IORESET.
1
High
IOR
IORESET
0
Low
I
I
I
I
I
I
I
'OR
I
x
I
·o·
must be written into this bit.
---~f
MSB
SLOT =O: CERAM1 is effective.
SLOT= 1 : CERAM2 is effective.
By driving BK'2 to
"1 , "
the system ROM 8000H
- BFFFH
is separated.
EXBANK3
0
EXBANK2
1
1
1
EXBANK1
1
0
0
EXBANKO
1
0
BK' O
SOOOH - BFFFH
bank
specification
BK' 2
BK' 1
• Supplied to BNK2, BNK1
,
and
BNKO pins
when making access to BK'2=BK'O (expan-
sion back port) 8000H - BFFFH.
8ANK3
ON Break key input
11 pin interface
i
n put port (181 and
182 are equipped
with pull down
resistor.)
Expansion
peripheral RESET
Chip enable signal
supplied when
making access to
OOOOH - 7FFFH
(Active high)
CEROM2 signal is
supplied. (Active
Low)
81<'2
BNK2
1FH
x
0
LSB
BANK2
0
BK'1
BNK1
1CH
0
x
L.S8
BANK1
0
OUT
BK'O
BNKO
1BH
0
0
specification
BK1
BKO
COOOH - FFFFH
bank
OUT
Input
pin
Output
pin
When making
access to 8000H ...;
BFFFH
CEROM1
signal
is
supplied (Active
low)
(
19H
0
0
0
0
0
17H
0
0
• Supplied to BNKO and BNK1 pins when
making access to BKO, BK1 system ROM
bank
port COOOH - FFFH.
O:
Low output
1 : High output
O:
Interruption inhibit
1 • Interruption enable
OUT
OUTF01,
F02
(Pch open drain)
BNKO
BKO
BNK1
BK1
Output
Input
pin
pin
When making
access to COOOH -
FFFFH
11 pin interface
output control port
Performs interrupt
enable/inhibit of
each interrupt
factor.
(
KON
181, 182
XIN
IORESET
CERAM1
CERAM2
BNKO
BNK1
BNK2
F01, F02, XOUT
Interrupt mask
READ WRITE
ADDRESS
Pin
function
18H
0
Bit map
IN
Function
Name
-
PC.!.E220
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