Campbell CR7 Manuel d'instructions télécharger pdf (Page 63)

6-1

SECTION 6. CS I/O 9 PIN SERIAL INPUT/OUTPUT

6.1 PIN DESCRIPTION

All external communication peripherals connect

to the CR7 through the 9-pin CS I/O connector

(Figure 6.1-1). Table 6.1-1 gives a brief

description of each pin's function.

CS I/O

FIGURE 6.1-1. CS I/O 9 Pin Connection

TABLE 6.1-1. Pin Description

ABR = Abbreviation for the function name.

PIN = Pin number.

O = Signal Out of the CR7 to a peripheral.

I = Signal Into the CR7 from a peripheral.

PIN ABR I/O Description

1 5V O 5V: Sources 5V DC, used

to power some peripherals.

2 G Ground: Provides a power

return for pin 1 (5V), and is

used as a reference for

voltage levels.

3 RING I Ring: When raised by a

peripheral the CR7 enters

telecommunications.

4 RXD I Receive Data: Serial data

transmitted by a peripheral

are received on pin 4.

5 ME O Modem Enable: Raised by

the CR7 after the ring line

has been raised.

PIN ABR I/O Description

6 PE O Printer Enable: Raised to

enable Storage Module or

other print device.

7 G I/O Ground, common with pin 2.

8 12 V O 12 volt power for

peripherals.

9 TXD O Transmit Data: Serial data

are transmitted from the

CR7 to peripherals on pin

9; logic low marking (0V)

logic high spacing (5V)

standard asynchronous

ASCII, 8 data bits, no

parity, 1 start bit, 1 stop bit,

300, 1200, 9600, 76,800

baud (user selectable).

1 2 ... 58 59 60 61 62 63 64 65 66 67 68 ... 185 186

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