mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 982

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

PRS—PCMCIA Region Select
The “DMA” encoding will generate a normal DMA transfer unless signaled as “last” by the
on-chip DMA controller. In this case, TC (OE) or TC (WE) is asserted. The “DMA last
transaction” encoding will generate a DMA transfer with TC (OE) or TC (WE) asserted,
regardless of any internal indication.
PSLOT—PCMCIA Slot Identifier
WP—Write-Protect
PV—PCMCIA Valid
This bit indicates that the contents of the PCMCIA base register and option register pair are
valid.
000 = Common memory space.
001 = Reserved.
010 = Attribute memory space.
011 = I/O space.
100 = DMA (normal DMA transfer.
101 = DMA last transaction.
110 = Drive the value of the A22 and A23 signals on CE2 and CE1.
111 = Reserved.
0 = Reserved.
1 = This window defined for slot B.
0 = This window is not write-protected.
1 = This window is write-protected. If you try to write to this window, a bus error
0 = This bank is invalid.
1 = This bank is valid
(machine check interrupt) will occur.
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
PCMCIA Interface
17-21