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H8/3003 Datasheet(PDF) 142 Page - Renesas Technology Corp

No. de pieza H8/3003
Descripción Electrónicos  microcontroller (MCU)
PDF  715 Pages
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Fabricante Electrónico  RENESAS [Renesas Technology Corp]
Página de inicio  http://www.renesas.com
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H8/3003 Datasheet(HTML) 142 Page - Renesas Technology Corp

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Pin Auto-Wait Mode: If the
WAIT pin is low, the number of wait states (TW) selected by bits
WC1 and WC0 are inserted.
In pin auto-wait mode, if the
WAIT pin is low at the fall of the system clock (ø) in the T2 state, the
number of wait states (TW) selected by bits WC1 and WC0 are inserted. No additional wait states
are inserted even if the
WAIT pin remains low. Pin auto-wait mode can be used for an easy
interface to low-speed memory, simply by routing the chip select signal to the
WAIT pin.
Figure 6-14 shows the timing when the wait count is 1.
Figure 6-14 Pin Auto-Wait Mode
ø
Address bus
Data bus
AS
RD
HWR
Data bus
,
LWR
T1
T2
T3
T1
T2
TW
T3
*
*
Read data
Read data
Write data
Write data
Read
access
Write
access
Note:
Arrows indicate time of sampling of the
pin.
*
WAIT
External address
External address
WAIT
RS
,
124



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