EMDB65xx

Copyright © 2005, EM Microelectronic-Marin SA

8

www.emmicroelectronic.com

8.

PORT A PULL-UP/DOWN SELECTION

For each microcontroller type it’s possible to add an external Pull-Up/Down Resistor on the input port A, by

using the specific JP16 Jumpers. (See following table for correct configuration)

Port I/O

Pull-Up

Pull-Down

PA0

JP16 1-2

JP16 3-4

PA1

JP16 5-6

JP16 7-8

PA2

JP16 9-10

JP16 11-12

PA3

JP16 13-14

JP16 15-16

9.

PORT A SWITCHES CONNECTION

Each switches [S2 :S5] are bitwise configurable by using the DIP1 switches [1:4] for connecting or

disconnecting the S switches.(ON position = switch connected)

Polarity selections of the S switches are done by using the specific JP17 jumper. (See following table for

correct configuration)

Switches

Pull-Up

Pull-Down

S2 or PA0 SW

JP17 1-2

JP17 3-4

S3 or PA1 SW

JP17 5-6

JP17 7-8

S4 or PA2 SW

JP17 9-10

JP17 11-12

S5 or PA3 SW

JP17 13-14

JP17 15-16

10.

PORT B LED CONNECTION

It’s Possible to connect or disconnect separately the LED DS[2:5] from the output PB[0:3] by using the DP1

switches [5:8] .(ON position = LED connected)

10.1

LED CONNECTION SELECTION

It’s possible to connect the LED on the Port PA[3:0] when the EM6580 is used.

The following table defines the possible configuration:

Resistor

LED Connected to

R9

PB[0]

R10

PB[1]

R11

PB[2]

R12

PB[3]

R13

PA[0]

R14

PA[1]

R15

PA[2]

R16

PA[3]

11.

HOW TO CONNECT THE BUZZER

The dedicated JP15 connector is used to select directly which Output Pad is used as buzzer output.

The following table defines the possible configuration:

Devices

Buzzer Output

PB0 Output

PA0

PA1

EM6505/21/22

JP15 2-4

JP15 4-6

Input only

Input only

EM6503/17/40

No Buzzer Output

JP15 4-6

Input only

Input only

EM6580

No Buzzer Output

PA4 input only

JP15 1-3

JP15 3-5