3069RF-ZTAT Datasheet, PDF (176/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

This is useful when inserting four or more T_W states, or when changing the number of T_W states for
different external devices.
The WAITE bit setting applies to all areas. Pin waits cannot be inserted in DRAM space.
Figure 6.17 shows an example of the timing for insertion of one program wait state in 3-state
space.
Inserted
by program wait Inserted by WAIT pin
T1
T2
Tw
Tw
Tw
T3
φ
WAIT
Address bus
Read access
AS
RD
Data bus
Read data
Write access
HWR, LWR
Data bus
Write data
Note: indicates the timing of WAIT pin sampling.
Figure 6.17 Example of Wait State Insertion Timing
Rev. 5.0, 09/04, page 154 of 978