Wait Control; Figure 6.15 Bus Control Signal Timing For 16-Bit, Two-State-Access Area; Figure 6.16 Bus Control Signal Timing For 16-Bit, Two-State-Access Area (3) (Word Access) - Hitachi H8/3062 Hardware Manual
Single-chip microcomputer h8/3062 series; h8/3062b series; h8/3062f-ztat series; h8/3064f-ztat series
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Read access
Write access
Note: n = 7 to 0
Figure 6.16 Bus Control Signal Timing for 16-Bit, Two-State-Access Area (3)
6.4.6
Wait Control
When accessing external space, the H8/3062 Series can extend the bus cycle by inserting wait
states (T
). There are two ways of inserting wait states: program wait insertion and pin wait
w
insertion using the WAIT pin.
Program Wait Insertion: From 0 to 3 wait states can be inserted automatically between the T
state and T
state on an individual area basis in three-state access space, according to the settings
3
of WCRH and WCRL.
φ
Address bus
CS
n
AS
RD
D
to D
15
8
D
to D
7
0
HWR
LWR
D
to D
15
8
D
to D
7
0
(Word Access)
Bus cycle
T
T
1
2
External address in area n
Valid
Valid
Valid
Valid
2
155
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