Epson Research and Development
Page 13
Vancouver Design Center
Hardware Functional Specification
S1D13503
Issue Date: 01/01/29
X18A-A-001-08
3.2 MPU with READY (or WAIT#) signal
Figure 2: 8-Bit Mode, Example: Z80
(example implementation only - actual may vary)
Figure 3: 16-Bit Mode, Example: i8086 (maximum mode)
(example implementation only - actual may vary)
MEMCS#
MEMW#
MEMR#
READY
DB0 to DB7
AB0 to AB15
IOCS#
IOW#
IOR#
RESET
S1D13503
Z80
RESET#
D0 to D7
WAIT#
A0 to A15
WR#
RD#
Decoder
IORQ#
A10 to A15
Decoder
MREQ#
MI#
8086
(Maximum mode)
CLK
READY
RESET#
RDY
MEMW#
MEMR#
READY
DB0 to DB15
AB0 to AB15
IOW#
IOR#
RESET
S1D13503
8284A
D0 to D15
T
OE
CLK
S2#
S1#
S0#
DEN
MRDC#
AMWC#
IORC#
AIOWC#
DT/R
CLK
READY
RESET#
8288
AB16 to AB19
M/IO#
BHE#
A0 to A16
STB
Decoder
A16 to A19
S2#
S1#
S0#
ALE
BHE#
AD0 to AD15
A16
BHE#
MEMCS#
IOCS#
Transceiver
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