Cirrus Logic CDB5466U - Manual (Page 7)

CDB5466U
DS676DB1 7
1.2.2.4 Selecting Frequency of E1 and E2
The pulse rate on E1 and E2 can be set to one of four frequency ranges. Input pins FREQ1 and FREQ0 determine
the maximum frequency on E1 and E2 for sine wave inputs with zero phase shift. The frequency of E2 is equal to
the frequency of E1 with active-low alternating pulses. Table 6 illustrates the options available.
The maximum frequency on the E1 and E2 output pins is determined by the position of the jumpers on J28, J29 and
J30, if the maximum peak differential signal applied to both channels is a sine wave with zero phase shift.
Maximum Frequency for a Sine Wave Frequency Select
FREQ2 FREQ1 FREQ0
E1 or E2 E1+E2 FOUT J28 J29 J30
0.125 Hz 0.25 Hz 64x(E1+E2) 16 Hz
0.25 Hz 0.5 Hz 32x(E1+E2) 16 Hz
0.5Hz 1.0 Hz 16x(E1+E2) 16 Hz
1.0 Hz 2.0 Hz 2048x(E1+E2) 4,096 Hz
0.125 Hz 0.25 Hz 128x(E1+E2) 32 Hz
0.25 Hz 0.5 Hz 64x(E1+E2) 32 Hz
0.5 Hz 1.0 Hz 32x(E1+E2) 32 Hz
1.0 Hz 2.0 Hz 16x(E1+E2) 32 Hz
Table 6. Energy Output Frequency
O
O VD+
FREQ2
GND
O
O VD+
FREQ1
GND
O
O VD+
FREQ0
GND
O
O VD+
FREQ2
GND
O
O VD+
FREQ1
GND
O
O VD+
FREQ0
GND
O
O VD+
FREQ2
GND
O
O VD+
FREQ1
GND
O
O VD+
FREQ0
GND
O
O
VD+
FREQ2
GND
(Default)
O
O
VD+
FREQ1
GND
(Default)
O
O
VD+
FREQ0
GND
(Default)
O
O VD+
FREQ2
GND
O
O VD+
FREQ1
GND
O
O VD+
FREQ0
GND
O
O
VD+
FREQ2
GND
O
O
VD+
FREQ1
GND
O
O
VD+
FREQ0
GND
O
O VD+
FREQ2
GND
O
O VD+
FREQ1
GND
O
O VD+
FREQ0
GND
O
O VD+
FREQ2
GND
O
O VD+
FREQ1
GND
O
O VD+
FREQ0
GND