C504 Datasheet, PDF (14/49 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C504
Special Function Registers
All registers, except the program counter and the four general purpose register banks, reside in the
special function register area.
The 63 special function register (SFR) include pointers and registers that provide an interface
between the CPU and the other on-chip peripherals. There are also 128 directly addressable bits
within the SFR area.
The SFRs of the C504 are listed in table 2 and table 3. In table 2 they are organized in groups
which refer to the functional blocks of the C504. Table 3 illustrates the contents of the SFRs in
numeric order of their addresses.
Semiconductor Group
14