C161U Datasheet, PDF (199/469 Pages) Infineon Technologies AG – Embedded C166 with USB, USART and SSC

C161U
External Bus Interface
ADDRSEL1 (FE18_H / 0C_H)
SFR
Reset Value: 0000_H
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RGSAD
RGSZ
rw
rw
ADDRSEL2 (FE1A_H / 0D_H)
SFR
Reset Value: 0000_H
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RGSAD
RGSZ
rw
rw
ADDRSEL3(FE1C_H / 0E_H)
SFR
Reset Value: 0000_H
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RGSAD
RGSZ
rw
rw
ADDRSEL4 (FE1E_H / 0F_H)
SFR
Reset Value: 0000_H
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RGSAD
RGSZ
rw
rw
Bit
RGSZ
RGSAD
Function
Range Size Selection
Range Start Address
Note: There is no register ADDRSEL0, as register BUSCON0 controls all external
accesses outside the four address windows of BUSCON4...BUSCON1 within the
complete address space.
Definition of Address Areas
The four register pairs BUSCON4/ADDRSEL4...BUSCON1/ADDRSEL1 allow to define
4 separate address areas within the address space of the C161U. Within each of these
address areas external accesses can be controlled by one of the four different bus
modes, independent of each other and of the bus mode specified in register BUSCON0.
Each ADDRSELx register in a way cuts out an address window, within which the
parameters in register BUSCONx are used to control external accesses. The range start
Data Sheet
199
2001-04-19