IBM Car Amplifier 7220 Uživatelský manuál stáhnout pdf (Strana 56)

5-16

Chapter 5, FRONT PANEL OPERATION

5.2.11 Digital Outputs Setup Menu

Figure 5-12, Digital Outputs Setup Menu

This menu, shown in figure 5-12, is used to control the 8 TTL lines of the rear panel

digital output port, used for controlling external equipment.

Decimal

The bit pattern appearing at the digital output port is set by an unsigned eight-bit

binary number, the decimal equivalent of which can range from 0 to 255. This

decimal value may be set using the left-hand display, so that for example if it were 0

the eight output lines would all be low, whereas if set to 255, then they would all be

high.

The centre of the right-hand display shows the number in binary format, with the

value of each bit shown below its bit number. Each of the keys around this display

will toggle one bit, as indicated by the numbers adjacent to them, providing a second

way of controlling the port.

Any changes made to the digital output in decimal format will be reflected in the

binary display and vice-versa.

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IBM Car Amplifier 7220 Uživatelský manuál Strana 56