SAB80C517 Datasheet, PDF (20/61 Pages) Siemens Semiconductor Group – 8-Bit CMOS Single-Chip Microcontroller

SAB 80C517/80C537
Special Function Registers
All registers, except the program counter and the four general purpose register banks, reside
in the special function register area. The 81 special function registers include arithmetic
registers, pointers, and registers that provide an interface between the CPU and the on-chip
peripherals. There are also 128 directly addressable bits within the SFR area. The special
function registers are listed in table 1. In this table they are organized in groups which refer to
the functional blocks of the SAB 80C517. Block names and symbols are listed in alphabetical
order.
Table 1
Special Function Register
Address Register Name
Register Contents
after Reset
CPU
ACC
B
DPH
DPL
DPSEL
PSW
SP
Accumulator
B-Register
Data Pointer, High Byte
Data Pointer, Low Byte
Data Pointer Select Register
Program Status Word Register
Stack Pointer
0E0_H ¹⁾
0F0_H ¹⁾
83_H
82_H
92_H
0D0_H ¹⁾
81_H
00_H
00_H
00_H
00_H
XXXX.X000_B ³⁾
00_H
07_H
A/D-
Converter
ADCON0
ADCON1
ADDAT
DAPR
A/D Converter Control Register 0
A/D Converter Control Register 1
A/D Converter Data Register
D/AConverter Program Register
0D8_H ¹⁾
0DC_H
0D9_H
0DA_H
00_H
XXXX.0000_B ³⁾
00_H
00_H
Interrupt
System
IEN0
CTCON ²⁾
IEN1
IEN2
IP0
IP1
IRCON
TCON ²⁾
T2CON ²⁾
Interrupt Enable Register 0
0A8_H ¹⁾
Com. Timer Control Register
0E1_H
Interrupt Enable Register 1
0B8_H ¹⁾
Interrupt Enable Register 2
9A_H
Interrupt Priority Register 0
0A9_H
Interrupt Priority Register 1
0B9_H
Interrupt Request Control Register 0C0_H ¹⁾
Timer Control Register
88_H ¹⁾
Timer 2 Control Register
0C8_H
00_H
0XXX.0000_B
00_H
XXXX.00X0_B ³⁾
00_H
XX00 0000_B
00_H
00_H
00_H
1) _{Bit-addressable special function registers}
2) _{This special function register is listed repeatedly since some bits of it also belong to other functional blocks.}
3) _{X means that the value is indeterminate and the location is reserved}
Semiconductor Group
19