SAF-C505-2RM Siemens Semiconductor Group, SAF-C505-2RM Datasheet - Page 56

• Manufacturer Part Number: SAF-C505-2RM
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: Siemens Semiconductor Group

Basic Programming Mode Selection
The basic programming mode selection scheme is shown in figure 28.
Figure 28
Basic Programming Mode Selection
Semiconductor Group
V
Clock
(XTAL1 / XTAL2)
RESET
PSEN
PMSEL1,0
PROG
PRD
PSEL
PALE
EA / V
CC
During this period signals
are not actively driven
PP
"0"
0,1
56
0 V
Stable
"1"
"0"
"1"
"0"
Ready for access
mode selection
C505A / C505CA
MCS03639
C505 / C505C
V
V
5 V
PP
IH
1997-12-01