Sharp PC-1600

-
PC-1600
Pin
Symbol In/Out
Active
Function
No.
level
39
Ml
Out
Low
(1)
When the Z-SOis in operation, the Z·80 Ml is an outpur on this line.
(2)
When the LH-5S03 is in operation, the signal created from the OPF signal of the
LH-5803 is sent on this line.
40
RFSH
Out
Low
Refresh signal.
(1)
The Z-80 RFSH signal is on this line.
(2)
When the LH-5803 is in operation, the signal created from the OPF signal of the
LH-5803 is sent on this line.
41 VDD
VCC
42 10E Out High This signal is issuedwhen the LH-5S03 tries to access"'OOH~**OFH and SOOOH~
o FFFH of the MEl space. When this signal is sent out, one weit is sent to the
LH·5S03. In terms of timing, the signal is sent with a half clock delay on the ME1.
I/> OS
I
_j
I
L
MEl
,
L. ___
LHWAIT
I
I
10E
J
43
CSOOl Out Low
Z-80 control ROM select signal.
0000H~7FFFH memory space (bank 0).
44
CS123
I7,Out
Low
(1)
Z-80 control ROM select signal.
8000H~BFFFH memory space (bank 6).
(2)
LH-5S03 control ROM select signal.
COOOH-FFFFH memory space.
45 CS24 Out
Low Z-80 control ROM select signal.
(1)
4000H-7FFFH memory space (bank 3).
(2)
SOOOH-COOOHmemory space (bank 4).
One wait is inserted.
46 LHS3
Out Low
!
Memory select signal.
47
LHS2 17 Out
Low
Oepending on the state of bit "6" of 1/0 3CH, the memory spaceselected
48
LHSl
17 Out
Low
differs.
b6 = 0
b 6 = 1
LHSl
ASOOH-AFFFH (bank 0)
BOOOH-B7FFH (bank 0)
LHS2
SOOOH~B7FFH (bank 0)
A800H-FAFFH (bank 0)
LHS3
B800H-BFFFH
(bank 0)
AOOOH-A7FFH (bank 0)
LHSl and LHS2 are pulled up internally.
LHS3 needsto be pulied up externally. (pulied up externally.)
49 RAM3
Out High
Memory select signal (internal 16KB RAM).
COOOH-FFFFH (bank 0).
50 RAM2
Out
Low
Memory select signal (Sl :).
SOOOH-BFFFH (bank 0, bank 1).
SOOOH-BFFFH (bank 2, bank 3).
51
RAMl
Out Low
Memory select signal (S2:).
SOOOH-BFFFH (bank 2, bank 3'_
52
SLCT
In
High
When this signal is at low, output of the memory and 1/0 select signal is
disabled.
Oisabled signals are: CS001, CS123, CS24, RAM3, RAM2, RAM1, 10E, 10SU, KA2,
KA1, KAO, C/D, and 10RP.
This Input is an outpur to the subcontroller and is at a high level when the system is
on.
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