Page 58

Epson Research and Development

 

Vancouver Design Center

 

 

Table 7-13: FPM-DRAM Write Timing

Symbol

Parameter

Min

 

Typ

Max

Units

 

 

 

 

 

 

 

t1

Memory clock

40

 

 

 

ns

 

 

 

 

 

 

 

 

Random read or write cycle time (REG[22h] bits [6:5] = 00)

5 t1

 

 

 

ns

 

 

 

 

 

 

 

t2

Random read or write cycle time (REG[22h] bits [6:5] = 01)

4 t1

 

 

 

ns

 

 

 

 

 

 

 

 

Random read or write cycle time (REG[22h] bits [6:5] = 10)

3 t1

 

 

 

ns

 

 

 

 

 

 

 

 

Row address setup time (REG[22h] bits [3:2] = 00)

2 t1

 

 

 

ns

 

 

 

 

 

 

t3

Row address setup time (REG[22h] bits [3:2] = 01)

1.45 t1

 

 

ns

 

 

 

 

 

 

 

 

Row address setup time (REG[22h] bits [3:2] = 10)

1 t1

 

 

 

ns

 

 

 

 

 

 

t4

Row address hold time (REG[22h] bits [3:2] = 00 or 10)

t1 - 1

 

 

ns

 

 

 

 

 

 

Row address hold time (REG[22h] bits [3:2] = 01)

0.45 t1

- 1

 

 

ns

 

 

 

 

 

 

 

 

 

 

t5

Column address set-up time

0.45 t1

- 1

 

 

ns

 

 

 

 

 

 

 

t6

Column address hold time

0.45 t1

- 1

 

 

ns

 

 

 

 

 

 

t7

CAS# pulse width

0.45 t1

 

0.55 t1 + 1

ns

 

 

 

 

 

 

 

t8

CAS# precharge time

0.45 t1

- 1

 

0.55 t1

ns

 

 

 

 

 

 

t9

RAS# hold time

0.45 t1

 

 

ns

 

 

 

 

 

 

 

RAS# precharge time (REG[22h] bits [3:2] = 00)

2 t1 - 1

 

 

ns

 

 

 

 

 

 

 

t10

RAS# precharge time (REG[22h] bits [3:2] = 01)

1.45 t1

- 1

 

 

ns

 

 

 

 

 

 

 

RAS# precharge time (REG[22h] bits [3:2] = 10)

1 t1 - 1

 

 

ns

 

 

 

 

 

 

 

 

RAS# to CAS# delay time

1.45 t1

- 2

 

1.55 t1

ns

 

(REG[22h] bit 4 = 1 and bits [3:2] = 00 or 10)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t11

RAS# to CAS# delay time

2.45 t1

- 2

 

2.55 t1

ns

(REG[22h] bit 4 = 0 and bits [3:2] = 00 or 10)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RAS# to CAS# delay time (REG[22h] bit 4 = 1 and bits [3:2] = 01)

1 t1 - 2

 

1 t1

ns

 

 

 

 

 

 

 

RAS# to CAS# delay time (REG[22h] bit 4 = 0 and bits [3:2] = 01)

2 t1 - 2

 

2 t1

ns

 

 

 

 

 

 

 

t12

Write command setup time

0.45 t1

- 1

 

 

ns

 

 

 

 

 

 

t13

Write command hold time

0.45 t1

 

 

ns

 

 

 

 

 

 

 

t14

Write Data setup time

0.45 t1

- 3

 

 

ns

 

 

 

 

 

 

 

t15

Write Data hold time

0.45 t1

- 2

 

 

ns

 

 

 

 

 

 

 

S1D13504

Hardware Functional Specification

X19A-A-002-18

Issue Date: 01/01/30

Page 64
Image 64
Epson S1D13504 manual T14 Write Data setup time 45 t1 T15 Write Data hold time