SAH-C515 SIEMENS [Siemens Semiconductor Group], SAH-C515 Datasheet - Page 14

• Manufacturer Part Number: SAH-C515
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Table 1-1
Pin Definitions and Functions (cont’d)
Symbol
P1.0 - P1.7
V
V
Semiconductor Group
*) I = Input
SS
CC
O = Output
38
37, 68
36-29
36
35
34
33
32
31
30
29
Number
P-LCC-
Pin
68
31-24
31
30
29
28
27
26
25
24
34
33, 69
P-MQFP-
Number
Pin
80
I/O*) Function
I/O
–
–
Port 1
is an 8-bit quasi-bidirectional I/O port with internal
pullup resistors. Port 1 pins that have 1's 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 (I
internal pullup resistors. The port is used for the low-
order address byte during program verification. Port
1 also contains the interrupt, timer, clock, capture
and compare pins that are used by various options.
The output latch corresponding to a secondary
function must be programmed to a one (1) for that
function to operate (except when used for the
compare functions). The secondary functions are
assigned to the port 1 pins as follows :
P1.0 / INT3 / CC0
P1.1 / INT4 / CC1
P1.2 / INT5 / CC2
P1.3 / INT6 / CC3
P1.4 / INT2
P1.5 / T2EX
P1.6 / CLKOUT
P1.7 / T2
Ground (0 V)
Supply voltage
during normal, idle, and power-down operation.
1-8
IL
, in the DC characteristics) because of the
Interrupt 3 input /
compare 0 output /
capture 0 input
Interrupt 4 input /
compare 1 output /
capture 1 input
Interrupt 5 input /
compare 2 output /
capture 2 input
Interrupt 6 input /
compare 3 output /
capture 3 input
Interrupt 2 input
Timer 2 external reload /
trigger input
System clock output
Counter 2 input
Introduction
C515