DS07-16303-3E Datasheet, PDF (77/97 Pages) Fujitsu Component Limited. – 32-bit RISC Microcontroller CMOS FR30 Series

MB91121
(9) Normal DRAM Mode Read/Write Cycle
(VCC = 3.0 V to 3.6 V, VSS = AVSS = 0.0 V, TA = 0 °C to + 70 °C)
Parameter
Symbol Pin name Condition
Value
Min.
Max.
Unit Remarks
RAS delay time
tCLRAH
tCHRAL
CLK
RAS

10
ns

10
ns
CAS delay time
tCLCASL
tCLCASH
CLK
CAS

10
ns

10
ns
ROW address delay time
COLUMN address delay time
tCHRAV
tCHCAV
CLK
A24 to A00

15
ns

15
ns
DW delay time
tCHDWL
tCHDWH
CLK
DW



15
ns
15
ns
Output data delay time
tCHDV1
CLK
D31 to D16

15
ns
RAS ↓ → valid data input time
tRLDV
RAS
D31 to D16

5 / 2 × tCYC
− 20
ns
*1
*2
CAS ↓ → valid data input time
CAS ↑ → data hold time
tCLDV
tCADH
CAS
D31 to D16

tCYC − 17 ns *1
0

ns
*1 : When Q1 cycle or Q4 cycle is extended for 1 cycle, add tCYC time to this rating.
*2 : Rating at a gear cycle of × 1.
When a gear cycle of 1/2, 1/4, 1/8 is selected, substitute “n” in the following equation with 1/2, 1/4, 1/8,
respectively.
Equation : (3 − n / 2) × tCYC − 20
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