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參數(shù)資料
| 型號： | Q67121-C1066 |
| 廠商： | SIEMENS AG |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-Bit CMOS Microcontroller |
| 中文描述： | 8位CMOS微控制器 |
| 文件頁數(shù)： | 22/69頁 |
| 文件大?。?/td> | 1124K |
| 代理商： | Q67121-C1066 |
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C515C
Semiconductor Group
22
1997-07-01
Special Function Registers
The registers, except the program counter and the four general purpose register banks, reside in
the special function register area. The special function register area consists of two portions : the
standard special function register area and the mapped special function register area. Two special
function registers of the C515C (PCON1 and DIR5) are located in the mapped special function
register area. For accessing the mapped special function register area, bit RMAP in special function
register SYSCON must be set. All other special function registers are located in the standard
special function register area which is accessed when RMAP is cleared (“0“). As long as bit RMAP
is set, mapped special function register area can be accessed. This bit is not cleared by hardware
automatically. Thus, when non-mapped/mapped registers are to be accessed, the bit RMAP must
be cleared/set by software, respectively each.
Special Function Register SYSCON (Address B1H)
Reset Value : 1010XX01B
Bit
The 59 special function registers (SFRs) in the standard and mapped SFR area include pointers
and registers that provide an interface between the CPU and the other on-chip peripherals. The
SFRs of the C515C are listed in
table 3
and
table 4
. In
table 3
they are organized in groups which
refer to the functional blocks of the C515C. The CAN-SFRs are also included in
table 3
.
Table 4
illustrates the contents of the SFRs in numeric order of their addresses.
Table 5
list the CAN-SFRs
in numeric order of their addresses.
Function
RMAP
Special function register map bit
RMAP = 0 : The access to the non-mapped (standard) special function
register area is enabled (reset value).
RMAP = 1 : The access to the mapped special function register area is
enabled.
7
6
5
4
3
2
1
0
1
RMAP
–
B1H
SYSCON
Bit No.
MSB
LSB
–
XMAP1
CLKP
PMOD
XMAP0
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