SAB80C517A-N18-T3 datasheet(8/77 Pages) SIEMENS

Part #	SAB80C517A-N18-T3

Description	8-Bit CMOS Single-Chip Microcontroller

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Manufacturer	SIEMENS [Siemens Semiconductor Group]

Direct Link	http://www.siemens.com/

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8 / 77 page

SAB 80C517A/83C517A-5

Semiconductor Group

7

1994-05-01

Pin Definitions and Functions

Symbol

Pin Number

I/O *)

Function

P-LCC-84

P-MQFP-100-2

P4.0 – P4.7 1– 3, 5 – 9

64 - 66,

68 - 72

I/O

Port 4

is a bidirectional I/O port with internal

pull-up resistors. Port 4 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 4 pins being externally pulled low

will source current (IIL, in the DC char-

acteristics) because of the internal pull-

up resistors.

This port also serves alternate compare

functions. The secondary functions are

assigned to the pins of port 4 as follows:

– CM0 (P4.0): Compare Channel 0

– CM1 (P4.1): Compare Channel 1

– CM2 (P4.2): Compare Channel 2

– CM3 (P4.3): Compare Channel 3

– CM4 (P4.4): Compare Channel 4

– CM5 (P4.5): Compare Channel 5

– CM6 (P4.6): Compare Channel 6

– CM7 (P4.7): Compare Channel 7

PE/SWD

4

67

I

Power saving modes enable Start

Watchdog Timer

A low level on this pin allows the soft-

ware to enter the power down, idle and

slow down mode. In case the low level

is also seen during reset, the watchdog

timer function is off on default.

Use of the software controlled power

saving modes is blocked, when this pin

is held on high level. A high level during

reset performs an automatic start of the

watchdog timer immediately after reset.

When left unconnected this pin is pulled

high by a weak internal pull-up resistor.

* I = Input

O = Output

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SAB80C517A-N18-T3 Datasheet(PDF) 8 Page - Siemens Semiconductor Group

SAB80C517A-N18-T3 Datasheet(HTML) 8 Page - Siemens Semiconductor Group

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