PCMCIA Interface
MOTOROLA MPC823e REFERENCE MANUAL 17-17
PCMCIA INTERFACE
17
This field is compared to the address on the address bus to determine if a PCMCIA window
is being accessed by an internal bus master. These bits are used in conjunction with the
BSIZE field in the POR.
17.5.6 PCMCIA Option Registers
The PCMCIA option registers 0-7 (POR0-POR7) control the size, timing parameters, and
memory access to the individual PCMCIA windows whose base addresses reside in the
corresponding PCMCIA base registers.
BSIZE—PCMCIA Bank Size
This field determines the bank size (the size of the address space in bytes) for the
corresponding PCMCIA window. The bank size is also used as an address mask and is
applied to the PBA field in the associated PCMCIA base register to an address generated
by an internal master. The bank size is calculated from BSIZE as:
00000 = 1 bytes.
00001 = 2 bytes.
00011 = 4 bytes.
00010 = 8 bytes.
00110 = 16 bytes.
00111 = 32 bytes.
POR0–POR7
BIT 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
FIELD BSIZE RESERVED PSHT
RESET ———
R/W R/W
R/W R/W
ADDR
(IMMR & 0xFFFF0000) + 0x84 (POR0), 0x8C (POR1), 0x94 (POR2), 0x9C (POR3),
0xA4 (POR4), 0xAC (POR5), 0xB4 (POR6), 0xBC (POR7)
BIT 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
FIELD PSST PSL PPS PRS
PSL
OT
WP PV
RESET — — — — ———
R/W R/W R/W R/W R/W R/W R/W R/W
ADDR
(IMMR & 0xFFFF0000) + 0x84 (POR0), 0x8C (POR1), 0x94 (POR2), 0x9C (POR3),
0xA4 (POR4), 0xAC (POR5), 0xB4 (POR6), 0xBC (POR7)
NOTE: — = Undefined.
BankSize 2
GRAYCODE BSIZE
()
=
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