
Epson Research and Development
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Vancouver Design Center
Hardware Functional Specification
S1D13706
Issue Date: 01/11/13
X31B-A-001-08
1.
t14 is the delay from when data is placed on the bus until the data is latched into the write buffer.
Note
Minimum one software WAIT state is required.
Table 6-8: Hitachi SH-3 Interface Timing
Symbol
Parameter
2.0V
3.3V
Unit
Min
Max
Min
Max
f
CKIO
Bus Clock frequency
20
66
MHz
T
CKIO
Bus Clock period
1/f
CKIO
1/f
CKIO
ns
t1
Bus Clock pulse width low
22.5
6.8
ns
t2
Bus Clock pulse width high
22.5
6.8
ns
t3
A[16:1], M/R#, RD/WR# setup to CKIO
0
1
ns
t4
CSn# high setup to CKIO
0
1
ns
t5
BS# setup
3
1
ns
t6
BS# hold
7
2
ns
t7
CSn# setup
0
1
ns
t8
A[16:1], M/R#, RD/WR# hold from CS#
0
0
ns
t9a
RD# or WEn# asserted for MCLK = BCLK (max. MCLK = 50MHz)
8.5
8.5
T
CKIO
t9b
RD# or WEn# asserted for MCLK = BCLK
÷
2
11.5
11.5
T
CKIO
t9c
RD# or WEn# asserted for MCLK = BCLK
÷
3
13.5
13.5
T
CKIO
t9d
RD# or WEn# asserted for MCLK = BCLK
÷
4
18.5
18.5
T
CKIO
t10
Falling edge RD# to D[15:0] driven (read cycle)
5
24
3
12
ns
t11
Rising edge CSn# to WAIT# high impedance
4
24
2
10
ns
t12
Falling edge CSn# to WAIT# driven low
3
24
2
12
ns
t13
CKIO to WAIT# delay
6
45
4
18
ns
t14
D[15:0] setup to 2
nd
CKIO after BS# (write cycle) (see note 1)
1
0
ns
t15
D[15:0] hold (write cycle)
0
0
ns
t16
WAIT# rising edge to D[15:0] valid (read cycle)
0
2
ns
t17
Rising edge RD# to D[15:0] high impedance (read cycle)
5
31
3
12
ns