∙BCD - Select Binary/BCD Counting (Bit 0)
0 | |
1 | BINARY CODED DECIMAL (BCD) COUNTER |
| (4 DIGITAL) |
|
|
N | The count of the binary counter is from 0 up to |
ot | 65,535 and the count of the BCD counter is |
e | from 0 up to 9,999 |
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|
Mode Definitions
In 8254, six operating modes can be selected. They are :
ØMode 0: Interrupt on Terminal Count
ØMode 1: Programmable
ØMode 2: Rate Generator.
ØMode 3: Square Wave Rate Generator.
ØMode 4: Software Triggered Strobe.
ØMode 5: Hardware Triggered Strobe.
All detailed description of these six modes are written in Intel Microsystems Components Handbook Volume II Peripherals.