r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 437

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

(2)
Wait cycle insertion for the SRAM interface can be controlled by CSnWCR. If the IW bits in
CSnWCR are set to a value other than 0, a software wait is inserted in accordance with the wait
control bits. For details, see section 11.4.4, CSn Wait Control Register (CSnWCR).
The specified number of Tw cycles is inserted as wait cycles in accordance with the CSnWCR
setting. The wait cycle insertion timing is shown in figure 11.9.
Wait Cycle Control
SH7785
Figure 11.8 Example of 8-Bit Data Width SRAM Connection
WE0
CSn
A16
RD
A0
D7
D0
Rev.1.00 Jan. 10, 2008 Page 407 of 1658
11. Local Bus State Controller (LBSC)
128K × 8 bits
A16
A0
CS
OE
I/O7
I/O0
WE
SRAM
REJ09B0261-0100