Bbc Programming Model - Motorola MPC533 Reference Manual

region attribute register). See Section 4.6.2.3, "Region Attribute Registers (MI_RA[0:3]),"
and Section 4.6.2.4, "Global Region Attribute Register (MI_GRA)" for details.
4.6

BBC Programming Model

4.6.1 Address Map
The BBC consists of three separately addressable sections within the internal chip address
space.
1. BBC and IMPU control registers. These are mapped in the SPR registers area and
may be programmed by using the RCPU mtspr/mfspr instructions.
2. Decompressor vocabulary RAM (DECRAM). The DECRAM array occupies the
4-Kbyte physical memory (8 Kbytes MPC533 address space is allocated for
DECRAM).
3. Decompressor class configuration registers (DCCR) block. It consists of 15
decompression class configuration registers. These registers are available for word
wide read/write accesses through U-bus. The registers occupy a 64-byte physical
block (8-Kbyte chip address space is allocated for the register block).
4.6.1.1 BBC Special Purpose Registers (SPRs)
Address for
SPR Number External
(Decimal) Master
Access (Hex)
528 0x2100
529 0x2300
560 0x2110
784 0x2180
785 0x2380
786 0x2580
787 0x2780
816 0x2190
MOTOROLA
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Figure 4-6. MPC533 Memory Map
Table 4-3. BBC SPRs
IMPU Global Region Attribute Register (MI_GRA). See Table 4-8 for bits
descriptions.
External Interrupt Relocation Table Base Address Register (EIBADR). See
Table 4-9 for bits descriptions.
BBC Module Configuration Register (BBCMCR). See Table 4-4 for bits descriptions
IMPU Region Base Address Register 0 (MI_RBA0). See Table 4-5 for bits
descriptions.
IMPU Region Base Address Register 1 (MI_RBA1). See Table 4-5 for bits
descriptions.
IMPU Region Base Address Register 2 (MI_RBA2). See Table 4-5 for bits
descriptions.
IMPU Region Base Address Register 3 (MI_RBA3). See Table 4-5 for bits
descriptions.
IMPU Region Attribute Register 0 (MI_RA0). See Table 4-6 for bits descriptions.
Chapter 4. Burst Buffer Controller 2 Module
BBC Programming Model
Register Name
4-15