r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1608

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

32. Electrical Characteristics
Rev.1.00 Jan. 10, 2008 Page 1578 of 1658
REJ09B0261-0100
CSnWCR.RDS = 001, CSnWCR.WTS = 001, CSnWCR.RDH = 001, CSnWCR.WTH = 001)
Figure 32.12 SRAM Bus Cycle: Basic Bus Cycle (CSnWCR.IW = 0000,
RD
CLKOUT
A25 to A0
CSn
RD/WR
D31 to D0
(Read)
WEn
D31 to D0
(Write)
BS
RDY
DACKn
(SA: IO ← memory)
DACKn
(SA: IO → memory)
DACKn
(DA)
Legend:
IO:
SA:
DA:
Note: DACK is configured as active-high.
DACK device
Single-address DMA transfer
Dual-address DMA transfer
t
t
t
WDD
WED1
DACD
t
t
t
t
t
t
TS1
CSD
RWD
AD
BSD
DACD
RSD
t
DACDF
t
T1
BSD
t
WEDF
t
t
WDD
DACD
t
t
RDS
RSD
T2
t
WEDF
t
TH1
DACD
t
RDH
t
DACDF
t
WDD
t
t
t
t
AD
CSD
RSD
t
RWD
DACD