msm7582b Oki Semiconductor, msm7582b Datasheet - Page 20

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

¡ Semiconductor
(6) CR5
B7: Modulator burst window output enable bit.
B6 to B4: ICT6 to ICT4. Device test control bits.
B3, B2: Local inverting mode setting bits.
B1: Clock pulse shaping mode selection bit.
B0: Power-on control bit for X1, X2 pins, when the clock pulse shaping mode.
Note: CR5 – B6 to B4 are used to test the device. They should be set to “0” during normal
CR5
Initial value
1/The timing of the I and Q baseband modulation output burst is output at the TXCO pin.
0/The 384 kHz transmit timing clock pulse is output at the TXCO pin.
(1, 1) = local inverting mode
(0, 0) = normal mode
1/Clock pulse shaping mode (Refer to Fig 9.)
0/Oscillator circuit mode
1/ Always power-on
0/ Power-down in the whole device power-down state when Power on otherwise.
Figure 9 Example of Application Circuit when the Clock Pulse Shaping Mode is
operation.
Generated by CR5-B1
BSTO
ENBL
B7
0
TCXO
19.2 MHz
ICT6
About
0.7 to 1.0 V
B6
0
MSM7582/82B TS-K
X1
ICT5
PP
B5
0
X2
Pulse shape
within about 3 V
MCK
ICT4
B4
0
PP
LOCAL
To other input
INV1
B3
of 19.2 MHz
0
LOCAL
INV0
B2
0
MSM7582/7582B
SEL1
CLK
B1
0
SEL0
CLK
B0
20/24
0