Page 34
Epson Research and Development
Vancouver Design Center
S1D13503
Hardware Functional Specification
X18A-A-001-08
Issue Date: 01/01/29
IOR# Timing
Figure 15: IOR# Timing (Non-MC68000)
Table 7-6: IOR# Timing (Non-MC68000)
3V/3.3V
5V
Symbol
Parameter
Min
Max
Min
Max
Units
t1
AB[9:0], BHE# and IOCS# valid before IOR# falling
edge
10
0
ns
t2
AB[9:0], BHE# and IOCS# hold from IOR# rising edge
20
10
ns
t3
IOR# falling edge to DB[15:0] valid
60
40
ns
t4
DB[15:0] hold from IOR# rising edge
20
15
ns
t5
IOR# rising edge to DB[15:0] hi-z delay
35
25
ns
AB[9:0]
IOCS#
IOR#
VALID
VALID
t2
t4
t5
t3
t1
DB[15:0]
BHE#
Hi-Z
Hi-Z
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