D12320VF25IV Datasheet, PDF (214/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 6 Bus Controller
Figure 6.14 shows an example of wait state insertion timing.
By program wait By WAIT pin
T₁
T₂
T_w
T_w
T_w
T₃
φ
Read
WAIT
Address bus
AS
RD
Data bus
Read data
Write
HWR, LWR
Data bus
Write data
Note: indicates the timing of WAIT pin sampling.
Figure 6.14 Example of Wait State Insertion Timing
The settings after a power-on reset are: 3-state access, 3 program wait state insertion, and WAIT
input disabled.
Rev.6.00 Sep. 27, 2007 Page 182 of 1268
REJ09B0220-0600