SAB-C501G-1E24N SIEMENS [Siemens Semiconductor Group], SAB-C501G-1E24N Datasheet - Page 8

• Manufacturer Part Number: SAB-C501G-1E24N
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Table 1
Pin Definitions and Functions
Symbol
P1.0 – P1.7 2–9
Semiconductor Group
*) I
O = Output
= Input
P-LCC-44 P-DIP-40 P-MQFP-44
2
3
Pin Number
1–8
1
2
40–44,
1–3,
40
41
8
I/O*) Function
I/O
Port 1
is a quasi-bidirectional I/O port with
internal pull-up resistors. Port 1 pins that
have 1s written to them are pulled high by
the internal pullup resistors, and in that
state can be used as inputs. As inputs,
port 1 pins being externally pulled low will
source current (
istics) because of the internal pull-up
resistors. Port 1 also contains the timer 2
pins as secondary function. The output
latch corresponding to a secondary
function must be pro-grammed to a one
(1) for that function to operate.
The secondary functions are assigned to
the pins of port 1, as follows:
P1.0 T2
P1.1 T2EX Capture - Reload trigger of
Input to counter 2
timer 2 / Up-Down count
I
IL
, in the DC character-
1997-04-01
C501