mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 549

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

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24.3.1 Chip select address register (FB_CSARn)
The CSARn registers specify the chip-select base addresses.
Addresses: FB_CSAR0 is FFFF_E800h base + 0h offset = FFFF_E800h
Freescale Semiconductor, Inc.
Bit
W
FFFF_E80C Chip select address register (FB_CSAR1)
R
FFFF_E800
FFFF_E804
FFFF_E808
FFFF_E810
FFFF_E814
Absolute
address
Reserved
(hex)
31
0
31–16
15–0
Field
BA
30
0
FB_CSAR1 is FFFF_E800h base + Ch offset = FFFF_E80Ch
29
0
Chip select address register (FB_CSAR0)
Chip select mask register (FB_CSMR0)
Chip select control register (FB_CSCR0)
Chip select mask register (FB_CSMR1)
Chip select control register (FB_CSCR1)
28
0
Refer to the device memory map for the only applicable Mini-
FlexBus "expansion" address range for which the chip-selects
can be active. Set the CSARn and CSMRn registers
appropriately before accessing this region.
Base address
Defines the base address for memory dedicated to chip-select FB_CSn. BA is compared to bits 31–16 on
the internal address bus to determine if chip-select memory is being accessed.
This read-only bitfield is reserved and always has the value zero.
27
0
26
0
25
0
24
0
BA
MCF51JF128 Reference Manual, Rev. 2, 03/2011
23
0
Register name
22
0
FB_CSARn field descriptions
21
0
20
0
19
0
FB memory map
18
0
Preliminary
NOTE
17
0
16
0
15
0
Description
14
0
13
0
Chapter 24 External Bus Interface (Mini-FlexBus)
12
0
(in bits)
Width
32
32
32
32
32
32
11
0
10
0
Access
0
9
R/W
R/W
R/W
R/W
R/W
R/W
0
8
0
0
7
Reset value
0000_0000h
0000_0000h
0000_0000h
0000_0000h
0000_0000h
0000_0000h
0
6
0
5
4
0
0
3
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24.3.2/
24.3.3/
24.3.1/
24.3.2/
24.3.3/
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