Motorola DSP56301 - Manual (Page 342)

Programming Sheets
B -30 DSP56301 User’s Manual
Figure B-18. Memory Space Base Address Configuration Register (CBMA)
Host Processor (HI32)
HI32 Memory Space Base Address Configuration Register (CBMA)
Reset = $00000000
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 19 18 17 16 23 22 21 20
Specifies the HI32 base address in UBM
Universal Bus Mode Base Address, Bits 23–16
Read/Write
Application: Date:
Programmer:
Sheet 9 of 10
27 26 25 24 31 30 29 28
PM7 PM6 PM5 PM4 PF MS1 MS0
Memory Space Indicator, Bit 0
Hardwired to 0
CBMA register maps HI32 into PCI memory
Modes: PCI
MSI
Modes: UBM only
PM23/ PM22/ PM21/ PM20/ PM19/ PM18/ PM17/ PM16/ PM15 PM14 PM13 PM12 PM11 PM10 PM9 PM8
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PM31 PM30 PM29 PM28 PM27 PM26 PM25 PM24
GB10 GB9 GB8 GB7 GB6 GB5 GB4 GB3
Memory Space, Bits 2–1
Hardwired to 00
CBMA register is 32 bits wide
Modes: PCI
Pre-fetch, Bit 3
Hardwired to 0
Data is not pre-fetchable
Modes: PCI
Memory Base Address Low, Bits 15–4
Modes: PCI
Hardwired to $000
Specifies the HI32 base address in PCI mode
PCI Mode Base Address High, Bits 31–16
Modes: PCI only