SAB80515 Datasheet, PDF (230/270 Pages) Siemens Semiconductor Group – 8-Bit Single-Chip Microcontroller Family

Device Specifications
Special Function Registers
All registers, except the program counter and the four general purpose register banks, reside
in the special function register area. The 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. All special function registers
are listed in table 1 and table 2.
In table 1 they are organized in numeric order of their addresses. In table 3 they are organized
in groups which refer to the functional blocks of the SAB 80C515.
Table 1: Special Function Register
Address
Register
Contents
after Reset
Address
80_H
P0 ¹⁾
0FF_H
98_H
81_H
SP
07_H
99_H
82_H
DPL
00_H
9A_H
83_H
DPH
00_H
9B_H
84_H
reserved
XX_H ²⁾
9C_H
85_H
reserved
XX_H ²⁾
9D_H
86_H
reserved
XX_H ²⁾
9E_H
87_H
PCON
000X 0000_B ²⁾ 9F_H
88_H
TCON ¹⁾
00_H
A0_H
89_H
TMOD
00_H
A1_H
8A_H
TL0
00_H
A2_H
8B_H
TL1
00_H
A3_H
8C_H
TH0
00_H
A4_H
8D_H
TH1
00_H
A5_H
8E_H
reserved
XX_H ²⁾
A6_H
8F_H
reserved
XX_H ²⁾
A7_H
90_H
P1 ¹⁾
0FF_H
A8_H
91_H
reserved
XX_H ²⁾
A9_H
92_H
reserved
XX_H ²⁾
AA_H
93_H
reserved
XX_H ²⁾
AB_H
94_H
reserved
XX_H ²⁾
AC_H
95_H
reserved
XX_H ²⁾
AD_H
96_H
reserved
XX_H ²⁾
AE_H
97_H
reserved
XX_H ²⁾
AF_H
1) _{Bit-addressable Special Function Register}
2) _{X means that the value is indeterminate and the location is reserved}
Register
SCON ¹⁾
SBUF
reserved
reserved
reserved
reserved
reserved
reserved
P2 ¹⁾
reserved
reserved
reserved
reserved
reserved
reserved
reserved
IEN0 ¹⁾
IP0
reserved
reserved
reserved
reserved
reserved
reserved
Contents
after Reset
00_H
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
0FF_H
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
00_H
X000 0000_B ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
XX_H ²⁾
Semiconductor Group
230