msm7583 Oki Semiconductor, msm7583 Datasheet - Page 17

• Manufacturer Part Number: msm7583
• Description: Shift Qpsk Modem
• Manufacturer: Oki Semiconductor

¡ Semiconductor
FUNCTIONAL DESCRIPTION
Control Registers
(1) CR0 (basic operation mode setting)
CR0
Initial value (*)
B7: Transmit envelope output power down control
B6: Transmit timing clock selection
B5: Modulation on/off control
B4, B3: Receiver input IF frequency selection
B2: Transmit envelope (I
B1, B0: Test mode selection bits. Each monitor output is output to the transmit ENV pin.
* The initial value is set when a reset signal is supplied at RESET.
0/Envelope output ON
1/Envelope output OFF
0/TXCI input: 384 kHz.
TXCO output: 384 kHz output from APLL
1/TXCI input: 3.84 MHz.
TXCO output: 384 kHz (one-tenth of the TXCI frequency)
1/modulation OFF (with phase fixed)
0/modulation ON.
(0, 0), (0, 1) : 1.2 MHz
(1, 0)
(1, 1)
When B1, B0 is (0, 0)
When B1, B0 is other than (0, 0) : 0/Channel 1 receive monitor output
(0, 0): transmit envelope (I
(0, 1): receiver phase detection signal output
(1, 0): receiver delay detection signal output
(1, 1): receiver internal AFC information output
ENVPD
B7
: 10.8 MHz
: 10.7 MHz/10.75 MHz
0
Transmit data TXD is input in synchronization with the rising edge of
TXCI (APLL is on.)
Transmit data TXD is input in synchronization with the rising edge of
TXCO (APLL is off.)
TXCSEL
B6
0
2
+ Q
2
2
MODOFF
or
+ Q
B5
0
: 0/
2
I + Q
2
1/I
1/Channel 2 receive monitor output
or
2
I + Q
I + Q
IFSEL1
+ Q
2
2
2
B4
0
) output selection
2
output
2
2
) output
output
IFSEL2
B3
0
ENVSEL
B2
0
TEST1
B1
0
MSM7583
TEST0
B0
0
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