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GP214D
1.4GHz DUAL PLL
Version 1.2 (Jan. 2006)
9
GAINTECH INCORPORATED
PROGRAMMABLE N-COUNTER, CH1 AND CH2
These counters consist of the 5-bit swallow counter, the 12-bit programmable main counter, and two
modulus prescaler providing divisions of 64 and 66. The swallow counter and main counter enable to set
any of 192 to 262142 divisions.
LSB
MSB
Swallow counter
Main counter
N1
N2
N3
N4
N5
N6
N7
N8
N9
N10
N11
N12
N13
N14
N15
N16
N17
N18
N19
N-Counter divide ratio, N
Group code
CH1, “10”
CH2, “01"
5-BIT SWALLOW COUNTER DIVIDE RATIO (A COUNTER)
Divide ratio: 0 to 31, B≥A
Divide
Ratio (A)
N5
N4
N3
N2
N1
0
0
0
0
0
0
1
0
0
0
0
1
・
・
・
・
・
・
31
1
1
1
1
1
12-BIT MAIN COUNTER DIVIDE RATIO (B COUNTER)
Divide ratio: 3 to 4095
Divide
Ratio (B)
N17
N16
N15
N14
N13
N12
N11
N10
N9
N8
N7
N6
3
0
0
0
0
0
0
0
0
0
0
1
1
4
0
0
0
0
0
0
0
0
0
1
0
0
・
・
・
・
・
・
・
・
・
・
・
・
・
4095
1
1
1
1
1
1
1
1
1
1
1
1
Divide ratio of channel 1 and 2 = N
N = 2×(32×B+A), B≥A
Divide ratio: 192 to 262142
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