msm7582b Oki Semiconductor, msm7582b Datasheet - Page 7

• Manufacturer Part Number: msm7582b
• Description: Pie/4 Shift Qpsk Modem
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Quadrature modulation signal envelope (
Its output level is 500 mV
: R 10 kW, C 20 pF. The gain of this output can be adjusted using the control register CR2 – B7
to B4.
This pin is also used to monitor eye pattern, AFC Compensating signal, and phase defection of
the demodulator block during the test mode. Refer to the description of the control register for
details.
Internal reference voltage output.
The output voltage is about 2.0 V. A bypass capacitor should be connected between this pin and
the AGND pin.
Inputs for power-down control.
PDN0 controls the standby / communication modes, PDN1 controls the modulator, and PDN2
controls the demodulator. Refer to Table 1 for details.
+3 V power supply voltage.
Analog signal ground.
Digital signal ground.
AGND and DGND are not connected in the device. This pin should be tied to the AGND pin on
the PCB as close as possible from the device.
ENV
SG
PDN0, PDN1, PDN2
AGND
DGND
V
Standby
Mode
Communication
Mode
DD
PDN0
0
0
0
1
1
1
1
PDN2 PDN1
0/1
0
1
0
0
1
1
PP
with 1.6 Vdc as a center value. The output pin load conditions are
Table-1 Power Down Control
1
0
0
0
1
0
1
All power-down. The control register is reset.
All power-down. The control register is not reset.
Modulator power is off (VREF and PLL power are also off).
Demodulator power is on.
Modulator power is off (VREF and PLL power is on).
I and Q outputs are in a high-impedance state.
Only demodulator clock recovery block power is on.
Modulator power is on
Only demodulator clock recovery block power is on.
Modulator power is off (VREF and PLL power is on).
I and Q outputs are in a high-impedance state.
Demodulator power is on.
Modulator power is on
Demodulator power is on.
I
2
+ Q
2
)output.
Function
MSM7582/7582B
Mode D
Mode G
Mode A
Mode B
Mode C
Mode E
Mode F
Mode
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