C505_9708 SIEMENS [Siemens Semiconductor Group], C505_9708 Datasheet - Page 73

• Manufacturer Part Number: C505_9708
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

6.1.3.2
Figure 6-7 shows the port driver circuit of the type C mixed digital/analog I/O port 1 lines of the
C505. The analog function is selected by the bits in the SFR P1ANA. When analog function is
selected, all output driver transistors (p1, p2, p3 and n1) are switched off.
Figure 6-7
Driver Circuit of Type C Port Pins
Semiconductor Group
Q
Enable Analog Input
(Bits of SFR P1ANA)
Type C Port Driver Circuitry
=1
Delay = 1 State
>1
>1
Input Data
(Read Pin)
&
6-11
V
SS
=1
p1
n1
On-Chip Peripheral Components
>1
=1
p2
V
CC
Converter
p3
to A / D
C505 / C505C
MCT03295
Port
Pin
1997-08-01