HD64F3039F18 Datasheet, PDF (148/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 6 Bus Controller
Pin Wait Mode 0
The wait state controller is disabled. Wait states can only be inserted by WAIT pin control. During
access to an external three-state-access area, if the WAIT pin is low at the fall of the system clock
(φ) in the T₂ state, a wait state (T_W) is inserted. If the WAIT pin remains low, wait states continue
to be inserted until the WAIT signal goes high. Figure 6.5 shows the timing.
Inserted by WAIT signal
T₁
T₂
T_W
T_W
T₃
φ
*
*
*
WAIT pin
Address bus
External address
AS
Read
access
RD
Data bus
Read data
Write
access
WR
Data bus
Write data
Note: * Arrows indicate time of sampling of the WAIT pin.
Figure 6.5 Pin Wait Mode 0
Rev.3.00 Mar. 26, 2007 Page 124 of 682
REJ09B0353-0300