r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 247

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

9.5.2
Basic Timing: For access to a normal space, this LSI uses strobe signal output in consideration of
the fact that mainly SRAM without a byte selection will be directly connected. Figure 9.2 shows
the basic timings of normal space access. A no-wait normal access is completed in two cycles.
It is necessary to control of outputing the data that has been read using RD when a buffer is
established in the data bus.
Figures 9.3 and 9.4 show the basic timings of continuous accesses to normal space. If the WM bit
in CSnWCR is cleared to 0, a Tnop cycle is inserted to evaluate the external wait (figure 9.3). If
the WM bit in CSnWCR is set to 1, external waits are ignored and no Tnop cycle is inserted
(figure 9.4).
Normal Space Interface
Figure 9.2 Normal Space Basic Access Timing (Access Wait 0)
Write
Read
A19 to A0
D7 to D0
D7 to D0
WRL
CSn
RD
CK
T1
Rev. 1.00 Sep. 21, 2007 Page 221 of 1124
T2
Section 9 Bus State Controller (BSC)
REJ09B0402-0100