C517A Datasheet, PDF (22/72 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C517A
Special Function Registers
The registers, except the program counter and the four general purpose register banks, reside in
the special function register area.
The 94 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 C517A are listed in
table 2 and table 3. In table 2 they are organized in groups which refer to the functional blocks of
the C517A. Table 3 illustrates the contents of the SFRs in numeric order of their addresses.
Semiconductor Group
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