SH7785 Datasheet, PDF (1623/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Item
Symbol
Write command to first
MDQS delay time
(Rising edge)
t
WDQSS
MDQS falling edge
t
WDSS
setup time to MCK
rising edge (Write)
MDQS falling edge hold t
WDSH
time to MCK rising edge
(Write)
MDQS high-level pulse t_WDQSH
width (Write)
MDQS low-level pulse t
WDQSL
width (Write)
MDQS preamble (Write) t_WPRE
MDQS postamble
t_WPST
(write)
MDQ/MDM setup time t_WDS
to MDQS (Write)
MDQ/MDM hold time to t
WDH
MDQS (Write)
MDQ/MDM signal width t
WDIPW
(Write)
MDQ high-impedance t_HZ
time from MDQS (Write)
Note: t : one MCK cycle time
MCK
Min. Max. Unit
WL WL t
MCK
−0.18 +0.18
0.27 — t
MCK
0.27 — t
MCK
0.35 0.9
t_MCK
0.35 0.9 t
MCK
0.35 —
t_MCK
0.4 —
t_MCK
430
ps
630 —
430
ps
630 —
0.35 — t
MCK
t_WDH
t_MCK
ns
32. Electrical Characteristics
Figure Notes
DDR2-600
DDR2-400
DDR2-600
DDR2-400
MCK0, MCK1
MCK0, MCK1
t_CK
t_CH
t_CL
Figure 32.26 MCK Output Clock
Rev.1.00 Jan. 10, 2008 Page 1593 of 1658
REJ09B0261-0100