E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 224

• Manufacturer Part Number: E62655RUSB
• Description: EMULATOR BASE H8S/2655R W/USB
• Manufacturer: Renesas Electronics America
• Type: Microcontrollerr

Specifications of E62655RUSB

• Contents: E6000 Emulator Unit and 4 Logic Probes
• For Use With/related Products: H8S/2655R
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 6 Bus Controller
6.6.7
There are two ways of inserting wait states in a PSRAM access cycle: program wait insertion and
pin wait insertion using the WAIT pin.
(1) Program Wait Insertion
(2) Pin Wait Insertion
Figure 6.34 shows an example of wait state insertion timing.
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REJ09B0331-05000
When the bit in ASTCR corresponding to an area designated as PSRAM space is set to 1, from
0 to 3 wait states can be inserted automatically between the T
the settings of WCRH and WCRL.
When the WAITE bit in BCRL is set to 1, wait input by means of the WAIT pin is enabled
regardless of the setting of the AST bit in ASTCR. When PSRAM space is accessed in this
state, a program wait is first inserted. If the WAIT pin is low at the falling edge of in the last
T
until it goes high.
2
or T
Wait Control
w
state, another T
w
state is inserted. If the WAIT pin is held low, T
2
state and T
w
3
states are inserted
state, according to