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