SA1110 Datasheet, PDF (175/406 Pages) Intel Corporation – Intel StrongARM SA-1110 Microprocessor

Memory and PCMCIA Control Module
10.6.3 PCMCIA Interface Timing Diagrams and Parameters
Figure 10-24 shows a 16-bit access to a 16-bit memory or I/O device. The parameter, BS, is
programmed in the MECR register. When common memory is accessed, the MECR:BSM0 or
MECR:BSM1 field is used, depending on whether card socket 0 or 1 is addressed. MECR:BSIO0,1
is used for I/O accesses and MECR:BSA0,1 is used for access to attribute memory. Figure 10-24
and Figure 10-25 show the appropriate setting of BS_xx = 0b00001.
Figure 10-24. PCMCIA Memory or I/O 16-Bit Access
CPU Clock
Memory
Clock
BCLK
A,nPREG,
PSKTSEL
nPCE2,
nPCE1
nPWE,nPIOW,
nPOE or nPIOR
RD/nWR
nIOIS16
(for IO only)
nPWAIT
Read Data D
(15:0)
Write Data D
(15:0)
BS_xx+1
3*(BS_xx+1)+1
Contents of PCMCIA register fields:
MECR:BS_xxn=1
BS_xx+1
3*(BS_xx+1)
BS_xx+2
MECR:FASTn=0
A6652-02
SA-1110 Developer’s Manual
10-61