Siemens EF 88H Series Manual do Utilizador descarregar pdf (Página 75)

Device Specification

Semiconductor Group 7-13

P6.0 - P6.7 70 - 77 46 - 50,

54 - 56

I/O Port 6

is a bidirectional I/O port with internal pull-

up resistors. Port 6 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 6

pins being externally pulled low will source

current (I

, in the DC characteristics)

because of the internal pull-up resistors.

Port 6 also contains the external A/D

converter control pin and the transmit and

receive pins for serial channel 1. The

output latch corresponding to a secondary

function must be programmed to a one (1)

for that function to operate.

The secondary functions are assigned to

the pins of port 6, as follows:

– ADST (P6.0): external A/D converter

start pin

– R × D1 (P6.1): receiver data input

of serial interface 1

–T × D1 (P6.2): transmitter data output

of serial interface 1

P8.0 - P8.3 78 - 81 57 - 60 I Port 8

is a 4-bit unidirectional input port. Port pins

can be used for digital input, if voltage

levels meet the specified input high/low

voltages, and for the higher 4-bit of the

multiplexed analog inputs of the A/D

converter, simultaneously

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 ... 70 71 72 73 74 75 76 77 78 79 80 ... 136 137

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