r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1620

• 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 1590 of 1658
REJ09B0261-0100
CLKOUT
A25 to A0
CSn
RD/WR
RD
D31 to D0
(Read)
WEn
BS
RDY
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
(1) Basic read cycle (no wait)
t
t
t
t
DACD
DACD
BSD
WED1
t
t
AD
t
t
T1
CSD
RWD
RSD
t
WEDF
t
Figure 32.24 Memory Byte Control SRAM Bus Cycle
t
DACD
RDS
t
t
T2
RSD
BSD
t
t
DACD
DACD
t
t
t
t
t
t
AD
CSD
RWD
RSD
WED1
t
RDH
(2) Basic read cycle (one internal wait cycle)
t
t
t
DACD
t
DACD
WED1
BSD
t
t
t
t
AD
T1
CSD
RWD
RSD
t
WEDF
t
t
t
t
Tw
BSD
DACD
RSD
RDYS
t
RDS
T2
t
RDYH
t
t
DACD
DACD
t
t
t
t
t
AD
WED1
CSD
RWD
RSD
t
RDH
(3) Basic read cycle (one internal wait + one external wait cycles)
t
t
t
WED1
BSD
DACD
t
t
t
t
t
T1
AD
RSD
CSD
DACD
RWD
t
WEDF
t
RDYS
t
t
t
RSD
Tw
DACD
BSD
t
RDYS
Twe
t
RDYH
t
RDS
T2
t
RDYH
t
DACD
t
t
t
t
t
t
WED1
AD
CSD
DACD
RWD
RSD
t
RDH