msm7532 Oki Semiconductor, msm7532 Datasheet - Page 10

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

¡ Semiconductor
RVBU
Ceramic receiver amplifier input pin.
Refer to the RCN, RCP description.
RCP, RCN
Ceramic receiver amplifier output pins.
PDRC
Pin used to control power down of the ceramic receiver amplifier.
If digital "1" is input in this pin, the two ceramic receiver amplifiers are powered down. If the LSI is
in power-down mode 1 or 2 (PDN = "1", RVE = "0"), the ceramic receiver amplifiers are powered
down even when the PDRC is at "0".
X1, X2
Crystal oscillator connection pins.
3.6864 MHz crystal oscillator should be connected.
If the load capacitance of the crystal oscillator is 16 pF, insert a 12 pF capacitor between X1 and GND
and between X2 and GND.
If an external clock is used, with X1 opened, the clock should be input from X2 through a 200 pF
capacitor.
C29 is a capacitor for oscillation prevention. Be sure to use a capacitor of 20 pF or more.
If no ceramic receiver amplifier is used, RVBU should be directly connected to RCP, RCN be open, and R16 to R19,
and C29 be removed.
C21
C22
LPF
RC
–
+
3.6864 MHz
–
+
X2
X1
RCN
RCP
RVBU
RVO
3.6864 MHz
C29
Open
R18
R19
High-speed CMOS or TTL, etc
R16
R17
R16 = R17 = 1.5 kW
R18 ≥ 10 kW
200 pF
Ceramic receiver
(Equivalent capacitance : 68 nF)
X2
X1
MSM7532
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