C501_1 Datasheet, PDF (27/121 Pages) Siemens Semiconductor Group – 8-Bit Single-Chip Microcontroller

Memory Organization
C501
Table 3-3
Contents of the SFRs, SFRs in numeric order of their addresses (cont’d)
Addr Register Content Bit 7
after
Reset¹⁾
Bit 6
Bit 5
Bit 4
D0H²⁾ PSW
00H
CY AC F0
RS1
E0H²⁾ ACC
00H
.7
.6
.5
.4
F0H²⁾ B
00H
.7
.6
.5
.4
1) X means that the value is undefined and the location is reserved
2) Bit-addressable special function registers
Bit 3
RS0
.3
.3
Bit 2
OV
.2
.2
Bit 1
F1
.1
.1
Bit 0
P
.0
.0
Semiconductor Group
3-6