r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1623

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

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