msm7532 Oki Semiconductor, msm7532 Datasheet - Page 12

• Manufacturer Part Number: msm7532
• Description: Single Chip Msk Modem With Compandor For Cordless Telephone
• Manufacturer: Oki Semiconductor

¡ Semiconductor
RT
Receive data timing re-generation clock output pin.
Outputs synchronous clock re-generated by built-in PLL. The data from RD and signals from FD are
output in synchronization with falling edges of signals from the RT pin. If FDE is at "1" level and FD
is at "0" level, RD remains set at "1" level.
Refer to "Receive Signal Timing" in Fig. 3.
V
Power supply pin.
A bypass capacitor more than 10 mF should be inserted between this pin and GND.
BIT
Bit synchronous signal detector control input pin.
The FD pin goes to "1" level when the BIT pin and FDE pin are at "1" level, and a 4-bit synchronous
signal and 16-bit frame synchronous signal are successively detected.
The FD pin goes to "1" level when the BIT pin is at "0" level and the FDE pin is at "1" level, and a 16-
bit frame synchronous signal is detected.
Refer to the FPS description.
FPS
Frame synchronous pattern setup input pin.
RCK1, RCK2, SEC
Reverse frequency selection pins of voice scrambler.
These pins are also used to select filter and scrambler bypass mode.
RCK1
SEC
DD
0
0
0
0
1
1
1
1
0
1
1
RCK2
PCK1
0
0
1
1
0
0
1
1
1
0
1
(These synchronous patterns are for Japanese cordless telephones.)
PCK2
BIT
0
0
1
1
0
1
0
1
0
1
0
1
Reverse freq.
FPS
Pre-BPF, SCR and LPF1 are bypassed
Pre-BPF and LPF1 are connected but
Scrambler circuit (SCR) is bypassed
Pre-BPF, SCR and LPF1 are bypassed
Scrambler works
0
1
0
1
3200 Hz
3291 Hz
3388 Hz
Transmit side
1010 1001 0011 0011 0110
1010 1100 0100 1101 0110
1001 0011 0011 0110
1100 0100 1101 0110
Detection Pattern
( = 9336H)
( = C4D6H)
( = A9336H)
( = AC4D6H)
DE-SCR and LPF2 are bypassed
LPF2 is connected but De-scrambler
(DE-SCR) is bypassed
DEM-BPF output is connected to RVO
pin via RC-LPF (for IC test)
De-scrambler circuit works
Receive side
Base station
Base station
Receiver
Handset
Handset
MSM7532
12/21
Note
SW4
SW3
SW4
SW9
SW3
SW4