Adlink ACL-8112 Series Manual do Utilizador descarregar pdf (Página 56)

48 • Operation Theory

0 16-BITS BINARY COUNTER

BINARY CODED DECIMAL (BCD) COUNTER (4

DIGITAL)

Note

The count of the binary counter is from 0 up to

65,535 and the count of the BCD counter is from 0

up to 9,999

Mode Definitions

With the 8254, six operating modes can be selected. they are:

• Mode 0: Interrupt on Terminal Count

• Mode 1: Programmable One-Shot.

• Mode 2: Rate Generator

• Mode 3: Square Wave Rate Generator

• Mode 4: Software Triggered Strobe

• Mode 5: Hardware Triggered Strobe

Detail description of these six modes is written in Intel Microsystems

Components Handbook Volume II Peripherals.

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