Siemens EF 88H Series Manual de usuario descargar pdf (Pagina 71)

Device Specification

Semiconductor Group 7-9

P1.7 - P1.0 29 - 36 98 - 100,

1, 6 - 9

I/O Port 1

is a bidirectional I/O port with internal

pull-up resistors. Port 1 pins that have

1 s written to them are pulled high by the

internal pull-up resistors, and in that state

can be used as inputs. As inputs, port 1

pins being externally pulled low will source

current (I

IL

, in the DC characteristics)

because of the internal pull-up resistors. It

is used for the low order address byte

during program verification. It also contains

the interrupt, timer, clock, capture and

compare pins that are used by various

options. The output latch 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:

–INT3/CC0 (P1.0): interrupt 3 input/

compare 0 output /capture 0 input

– INT4/CC1 (P1.1): interrupt 4 input /

compare 1 output /capture 1 input

– INT5/CC2 (P1.2): interrupt 5 input /

compare 2 output /capture 2 input

– INT6/CC3 (P1.3): interrupt 6 input /

compare 3 output /capture 3 input

– INT2/CC4 (P1.4): interrupt 2 input /

compare 4 output /capture 4 input

– T2EX (P1.5): timer 2 external

reload trigger input

– CLKOUT (P1.6): system clock output

– T2 (P1.7): counter 2 input

*

I = Input

O = Output

Pin Definitions and Functions (cont’d)

Symbol Pin Number

I/O

*)

Function

P-LCC-84 P-MQFP-100-2

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 136 137

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