SAB80515-N-T40 Ver la hoja de datos (PDF) - Siemens AG

Número de pieza

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Fabricante

SAB80515-N-T40

8 Bit Single-Chip Microcontroller

Siemens AG 

SAB 80515/80535

Pin Definitions and Functions (cont’d)

Symbol Pin

Input (I) Function

Output (O)

P1.7 - P1.0 29 - 36 I/O

VBB

37

XTAL2

39

–

XTAL1

40

–

Port 1 is an 8-bit bidirectional I/O port .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 out-

put latch must be programmed to a one (1) for that func-

tion to operate (except when used for the compare func-

tions). 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(P1.4): interrupt 2 input

– T2EX (P1.5): timer 2 external reload

trigger input

– CLKOUT (P1.6): system clock output

– T2 (P1.7): counter 2 input

Substrate pin. Must be connected to VSS through a

capacitor (47 to 100 nF) for proper operation of the A/D

converter.

XTAL2 is the output from the oscillator’s amplifier.Input

to the internal timing circuitry. A crystal, ceramic resona-

tor, or external source can be used.

XTAL1 is the input to the oscillator’s high gain amplifier.

Required when a crystal or ceramic resonator is used.

Connect to VSS when external source is used on

XTAL2.

Semiconductor Group

8

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