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PXA250 and PXA210 Applications Processors Design Guide 2-13
System Memory Interface
Figure 2-5. Expansion Card External Logic for a One-Socket Configuration
Table 2-9. Card Interface (PCMCIA or Compact Flash) AC Specifications (Sheet 1 of 2)
Symbol Description
MEMCKLK
Units
Notes
99.5 118.0 132.7 147.5 165.9
Card Interface (PCMCIA or Compact Flash) (Asynchronous)
tcardAS
MA(25:0), nPREG, PSKTSEL, nPCE
setup to nPWE, nPOE, nPIOW, or
nPIOR asserted
20 17 15 13.6 12 ns, 1
tcardAH
MA(25:0), nPREG, PSKTSEL, nPCE
hold after nPWE, nPOE, nPIOW, or
nPIOR de-asserted
10 8.5 7.5 6.8 6 ns, 1
tcardDS
MD(31:0) setup to nPWE, nPOE,
nPIOW, or NPIOR asserted
10 8.5 7.5 6.8 6 ns, 1
MD<15:0> D<15:0>
nOE
DIR
nCD<1>
nCD<2>
RDY/nBSY
A<25:0>
nREG
nCE<2:1>
nOE
nWE
nIOR
nIOW
nWAIT
nIOIS16
GPIO<w>
GPIO<x>
MA<25:0>
nPREG
nPOE
nPWE
nPIOR
nPIOW
nPWAIT
nIOIS16
nPCE<2:1>
GPIO<y>
PSKTSEL
RD/nWR
GPIO<z>
PXA250
Socket 0
nPCD0
nPCD1
PRDY_BSY0
PADDR_EN0
5V to 3.3V
5V to 3.3V