ADLINK ACL-8454/12 User Manual

Page 40

• Signal Connections & Applications

360,000,000 = 60000 x 6000

Therefore, ‘user configurable cascaded counters’ can be used
to solve this problem. The counter #1 and #2 are used in this
example.

step 3: Set jumper ‘CK1’. The clock source is internal ‘CLOCK2’ and it

is set as 100 KHz in default. Then set jumper ‘CK2’ and the
clock source is coming for the output of the ‘Last channel (#1)‘.

step 4: Skip these steps.

step 5: Write and verify the control program for counter #1.

step 6: Skip these steps.

step 7: The gate source of the two counters is enable always. Note the

jumper ‘G1’ and ‘G2’ should be removed and no external gate
signals are used.

step 8: Connect the counter #2 output to external device. The following

block diagram illustrates the application

step

9: Write and verify the control program. Please refer the

‘DEMO2.C’ source code.

100 K Hz

COUT1

Counter #1

8254 Chip #1

'H'

Jumper

CK1

Jumper

CLOCK2

COUT2

Counter #2

8254 Chip #1

'H'

Jumper

CK2

Figure 4.3 Example of frequency generator (2)