Motorola ColdFire MCF5281 - Manual (Page 220)

Chip Select Module
12-6 Freescale Semiconductor
12.4.1 Chip Select Module Registers
The chip select module is programmed through the chip select address registers (CSAR0–CSAR6), chip
select mask registers (CSMR0–CSMR6), and the chip select control registers (CSCR0–CSCR6).
12.4.1.1 Chip Select Address Registers (CSAR0–CSAR6)
The CSARs, Figure 12-2 , specify the chip select base addresses.
Table 12-6 describes CSAR[BA].
12.4.1.2 Chip Select Mask Registers (CSMR0–CSMR6)
The CSMRs, Figure 12-3 , are used to specify the address mask and allowable access types for the
respective chip selects.
.
Table 12-7 describes CSMR fields.
15 0
Field BA
Reset Uninitialized
R/W R/W
Address 0x080 (CSAR0); 0x08C (CSAR1); 0x098 (CSAR2); 0x0A4 (CSAR3);
0x0B0 (CSAR4); 0x0BC (CSAR5); 0x0C8 (CSAR6)
Figure 12-2. Chip Select Address Registers (CSARn)
Table 12-6. CSARn Field Description
Bits Name Description
15–0 BA Base address. Defines the base address for memory dedicated to chip select CS[6:0]. BA is compared
to bits 31–16 on the internal address bus to determine if chip select memory is being accessed.
31 16 15 9 8 7 6 5 4 3 2 1 0
Field BAM — WP — AM C/I SC SD UC UD V
Reset Unitialized 0
R/W R/W
Addr 0x084 (CSMR0); 0x090 (CSMR1); 0x09C (CSMR2); 0x0A8 (CSMR3);
0x0B4 (CSMR4); 0x0C0 (CSMR5); 0x0CC (CSMR6)
Figure 12-3. Chip Select Mask Registers (CSMRn)
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3