Epson Research and Development

Page 43

Vancouver Design Center

 

 

 

Table 7-4: Generic MPU Interface Synchronous Timing

Symbol

Parameter

Min

Max

Units

 

 

 

 

 

TBCLK

Bus clock period

25

 

ns

t1

A[20:0], M/R#, CS#, RD0#,RD1#,WE0#,WE1# hold time

1

 

ns

 

 

 

 

 

t2

A[20:0], M/R#, CS#, RD0#,RD1#,WE0#,WE1# setup time

5

 

ns

 

 

 

 

 

t3

RD0#,RD1#,WE0#,WE1# high to A[20:0], M/R# invalid and CS# high

0

 

ns

 

 

 

 

 

t41

RD0#,RD1#,WE0#,WE1# low and CS# low to WAIT# driven low

1

7

ns

t5

BCLK to WAIT# high

0

15

ns

 

 

 

 

 

t6

RD0#,RD1#,WE0#,WE1# high to WAIT# high impedance

1

6

ns

 

 

 

 

 

t7

D[15:0] valid to second BCLK where RD0#,RD1#,WE0#,WE1# low and CS#

5

 

ns

low (write cycle)

 

 

 

 

 

 

 

 

 

 

t8

D[15:0] hold from WE0#, WE1# high (write cycle)

0

 

ns

 

 

 

 

 

t92

RD0#,RD1# low to D[15:0] driven (read cycle)

3

15

ns

t10

D[15:0] valid to WAIT# high (read cycle)

0

 

 

 

 

 

 

 

t11

RD0#, RD1# high to D[15:0] high impedance (read cycle)

2

10

 

 

 

 

 

 

1.If the S1D13504 host interface is disabled, the timing for WAIT# driven low is relative to the falling edge of CS# and RD0#, RD1#, WE0#, WE1# or the first positive edge of BCLK after A[20:0] and M/R# become valid, whichever occurs later.

2.If the S1D13504 host interface is disabled, the timing for D[15:0] driven is relative to the fall- ing edge of RD0#, RD1# or the first positive edge of BCLK after A[20:0] and M/R# become valid, whichever occurs later.

Hardware Functional Specification

S1D13504

Issue Date: 01/01/30

X19A-A-002-18

Page 49
Image 49
Epson S1D13504 manual Low write cycle D150 hold from WE0#, WE1# high write cycle