SH7014 datasheet(601/754 Pages) RENESAS

601 / 754 page

22. Electrical Characteristics (5 V 28.7 MHz)

Rev.5.00 Sep. 27, 2007 Page 567 of 716

REJ09B0398-0500

Notes: n is the number of waits. m is 0 when the number of DRAM write cycle waits is 0, and 1

otherwise. RCD is the set value of the RCD bit in DCR.

1. If the access time is satisfied, t

RDS need not be satisfied.

2. t

WDH (max) is a reference value.

3. The delay time Min values are reference values (typ).

4. t

RDS is a reference value.

5. At 28.7 MHz, t

ASR = 0 ns (min)

Table 22.7

Bus Timing

Conditions:

CC = 5.0 V ±10%, AVCC = 5.0 V ±10%, AVCC = VCC ±10%, VSS = AVSS = 0 V,

Ta =

−20 to +75°C

Item

Symbol

Min

Max

Unit Figure

Write address setup time

⎯

22.6 to 22.7

Write address hold time

⎯

Write data hold time

WRH

⎯

Read/write strobe delay time 1 t

RWD1

22.9 to 22.14

Read/write strobe delay time 2 t

RWD2

High-speed page mode

CAS

precharge time

cyc −25

⎯

22.14

RAS precharge time

cyc × (TPC + 1.5) − 15

⎯

22.9 to 22.14

CAS setup time

CSR

⎯

22.15, 22.16

AH delay time 1

AHD1

22.17

AH delay time 2

AHD2

Multiplex address delay time

MAD

Multiplex address hold time

MAH

⎯

DACK delay time

DACKD1

22.6, 22.7, 22.9 to

22.14, 22.17

Notes: TPC is the set value of the TPC bit in DCR.

The delay time Min values are reference values (typ).)

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