Epson Research and Development
Page 33
Vancouver Design Center
Hardware Functional Specification
S1D13704
Issue Date: 01/02/08
X26A-A-001-04
7.1.6 Generic #2 Interface Timing
Figure 7-6: Generic #2 Timing
Note
BCLK may be turned off (held low) between accesses - see Section 13.5, “Turning Off
BCLK Between Accesses” on page 86
Table 7-6: Generic #2 Timing
Symbol
Parameter
Min
Max
Units
f
BCLK
Bus Clock frequency
0
50
MHz
T
BCLK
Bus Clock period
1/f
BCLK
t1
A[15:0], BHE#, CS# valid to WE#, RD# low
0
ns
t2
WE#, RD# high to A[15:0], BHE#,
CS# invalid
0
ns
t3
WE# low to D[15:0] valid (write cycle)
T
BCLK
t4
WE# high to D[15:0] invalid (write cycle)
0
ns
t5
RD# low to D[15:0] driven (read cycle)
16
ns
t6
D[15:0] valid to WAIT# high (read cycle)
0
ns
t7
RD# high to D[15:0] high impedance (read cycle)
10
ns
t8
WE#, RD# low to WAIT# driven low
14
ns
t9
BCLK to WAIT# high
16
ns
t10
WE#, RD# high to WAIT# high impedance
11
ns
t8
t4
t9
t3
t1
t10
BCLK
A[15:0]
CS#
WE#,RD#
WAIT#
VALID
t2
Hi-Z
Hi-Z
Hi-Z
VALID
T
BCLK
t6
t7
VALID
Hi-Z
Hi-Z
D[15:0]
D[15:0]
t5
BHE#
(write)
(read)
*