Epson Research and Development
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Vancouver Design Center
Hardware Functional Specification
S1D13503
Issue Date: 01/01/29
X18A-A-001-08
7 A.C. CHARACTERISTICS
Conditions : V
DD
= 3.0V ± 10%, V
DD
= 3.3V ± 10%, or V
DD
= 5.0V ± 10% T
A
= -40
°
C to 85
°
C
T
rise
and
T
fall
for all inputs must be < 5 nsec (10% ~ 90%)
C
L
= 80pF (Bus/MPU Interface)
C
L
= 100pF (LCD Panel Interface)
C
L
= 20pF (Display Memory Interface)
7.1 Bus Interface Timing
7.1.1 MC68000 Interface Timing
Note
All input timing parameters are based on a maximum 16MHz MPU clock.
IOW# Timing
Figure 10: IOW# Timing (MC68000)
Table 7-1: IOW# Timing (MC68000)
3V/3.3V
5V
Symbol
Parameter
Min
Max
Min
Max
Units
t1
AB[9:1] valid before AS# falling edge
10
0
ns
t2
AB[9:1] hold from AS# rising edge
20
10
ns
t3
IOCS# hold from AS# rising edge
0
0
ns
t4
UDS#/LDS# valid before AS# rising edge
30
20
ns
t5
UDS#/LDS# falling edge to DTACK# falling edge
40
25
ns
t6
AS# rising edge to DTACK# hi-z delay
40
25
ns
t7
DB[15:0] setup to AS# rising edge
20
10
ns
t8
DB[15:0] hold from AS# rising edge
20
10
ns
AB[9:1]
AS#
UDS#/LDS#
VALID
VALID
t2
t6
t3
t1
DB[15:0]
R/W
DTACK#
t5
t4
IOCS#
t7
t8
Hi-Z
Hi-Z
Hi-Z
Hi-Z
INVALID
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