參數(shù)資料
型號(hào)： SAF-C515A-LM
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 8-BIT, 18 MHz, MICROCONTROLLER, PQFP80
封裝： METRIC, PLASTIC, QFP-80
文件頁數(shù)： 10/58頁
文件大小： 634K
代理商： SAF-C515A-LM
C515A
Semiconductor Group
18
1997-10-01
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. One special
function register of the C515A (PCON1) is located in the mapped special function register area. For
accessing this mapped special function register, 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“).
Special Function Register SYSCON (Address B1H)
Reset Value : XX10XX01B
As long as bit RMAP is set, the mapped special function register area (SFR PCON1) 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 respectively by software.
The 49 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. All
SFRs with addresses where address bits 0-2 are 0 (e.g. 80H, 88H, 90H, 98H, …, F8H, FFH) are
bitaddressable. The SFRs of the C515A are listed in table 2 and table 3. In table 2 they are
organized in groups which refer to the functional blocks of the C515A. Table 3 illustrates the
contents of the SFRs in numeric order of their addresses.
Bit
Function
RMAP
Special function register map bit
RMAP = 0: The access to the non-mapped (standard) special function
register area is enabled.
RMAP = 1: The access to the mapped special function register area (SFR
PCON1) is enabled.
–
Reserved bits for future use. Read by CPU returns undefined values.
76543210
EALE
RMAP
–
B1H
SYSCON
Bit No.
MSB
LSB
–
XMAP1
––
XMAP0
The functions of the shaded bits are not described in this section.
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