SA1110 Datasheet, PDF (117/406 Pages) Intel Corporation – Intel StrongARM SA-1110 Microprocessor

Memory and PCMCIA Control Module
auto-power-down mode bits (one for clock enables, one for clocks) can be set so that each pin
(including SDCKE 0 and SDCLK 0) is automatically deasserted whenever none of the
corresponding banks is being accessed.
• PCMCIA Interface
The PCMCIA interface provides control signals to support a single PCMCIA card slot with
additional hooks to support two slots. It shares address and data pins with the memory devices. It
uses address lines, A 25:0, and data lines, D 15:0. nPREG is actually A 26 and selects register
space (I/O or attribute) versus memory space. nPOE and nPWE are provided for memory and
attribute reads and writes. nPIOR, nPIOW, and nIOIS16 input control I/O reads and writes.
nPWAIT allows for extended access times. nPCE2 and nPCE1 are byte select high and low,
respectively. PSKTSEL selects between two card slots.
This interface also supports 32-bit accesses that are outside the PCMCIA specification. See
Section 10.6 for information about restriction to the use of this feature.
SA-1110 Developer’s Manual
10-3