saa-xc886clm Infineon Technologies Corporation, saa-xc886clm Datasheet - Page 29

• Manufacturer Part Number: saa-xc886clm
• Description: 8-bit Single Chip Microcontroller
• Manufacturer: Infineon Technologies Corporation

SYSCON0
System Control Register 0
Field
RMAP
1
0
Note: The RMAP bit should be cleared/set by ANL or ORL instructions.
3.2.2.2
Address extension is further performed at the module level by paging. With the address
extension by mapping, the SAA-XC886 has a 256-SFR address range. However, this is
still less than the total number of SFRs needed by the on-chip peripherals. To meet this
requirement, some peripherals have a built-in local address extension mechanism for
increasing the number of addressable SFRs. The extended address range is not directly
controlled by the CPU instruction itself, but is derived from bit field PAGE in the module
page register MOD_PAGE. Hence, the bit field PAGE must be programmed before
accessing the SFR of the target module. Each module may contain a different number
of pages and a different number of SFRs per page, depending on the specific
requirement. Besides setting the correct RMAP bit value to select the SFR area, the user
must also ensure that a valid PAGE is selected to target the desired SFR. A page inside
the extended address range can be selected as shown in
Data Sheet
7
Address Extension by Paging
6
0
r
Bits
0
2
[7:5],
3,1
5
Type Description
rw
r
r
Interrupt Node XINTR0 Enable
0
1
Reserved
Returns 1 if read; should be written with 1.
Reserved
Returns 0 if read; should be written with 0.
IMODE
rw
4
The access to the standard SFR area is
enabled
The access to the mapped SFR area is
enabled
22
3
0
r
Figure
2
1
r
Functional Description
8.
SAA-XC886CLM
Reset Value: 04
1
0
r
V1.0, 2009-09
RMAP
rw
0
H