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TMPR3911 Datasheet(PDF) 122 Page - Toshiba Semiconductor

Part # TMPR3911
Description  32-Bit TX System RISC TX39 Family
PDF  462 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMPR3911 Datasheet(HTML) 122 Page - Toshiba Semiconductor

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Chapter 4 BIU Module
4-22
Figure 4.3.7 I/O Access to Card
The PCMCIA specification provides for a WAIT* signal that allows the Card to halt the bus cycle
until the WAIT* signal is de-asserted. This allows the Card to control the access time. The WAIT*
signal will assert at the beginning of the cycle and the cycle should not terminate until the WAIT* signal
becomes de-asserted. There are separate WAIT* signals provided for each Card: WAIT2* and WAIT1*.
The WAIT* signals are sampled on two consecutive rising edges of CLK. If the WAIT* signal is low,
the access time counter will freeze until the WAIT* signal goes high. This function will only occur if
the WAIT function is enabled using the CARDxWAITEN control bit. If the WAIT function is not
enabled, the WAIT* signal is ignored. Figure 4.3.6 shows the timing for Card WAIT accesses.
Figure 4.3.8 Card Wait Timing
DCLKOUT
ALE
A[12:0]
D[31:16]
CARDxCSH*/L*
RD*
4
×CARDxIOACCVAL–4
4
×CARDxIOACCVAL–4
WE*
CARDDIR*
CARDDREG
IORD*
IOWR*
DCLKOUT
ALE
A[12:0]
D[31:16]
CARDxCS*
RD*
WAITx*



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