參數(shù)資料
型號： MC72000
廠商： 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述： Integrated Bluetooth Radio
中文描述： 集成藍牙無線
文件頁數(shù)： 48/156頁
文件大?。?/td> 1782K
代理商： MC72000
48
MC72000 Advance Information Data Sheet
Go to: www.freescale.com
MOTOROLA
Radio Functional Description
6.7 External Antenna Switch
An external antenna switch, shown in Figure 92, provides isolation between the PA output and the LNA
input and subsequently enables transmit and receive cycles. The controls to the switch are GPO and
EPAEN, pins 9 and 4 respectively, of the MC72000 device. When GPO is high, the switch is set to
transmit mode. EPAEN serves as a complementary driver in this configuration. See Section 10,
“Applications Information,” for further information.
6.8 General Purpose Output (GPO) Pin
The MC72000 general purpose output (GPO) is located at Pin K5 of the device. Its output is programmed
for general use by setting bit R2/8 in the Radio Register Map. The GPO can serve as a control line for an
external antenna switch.
6.9 External Power Amplifier Enable (EPAEN) Pin
The External Power Amplifier Enable (EPAEN) output of MC72000 is located at Pin K2 of the device.
EPAEN may be used in two applications. It may assist in Class 1 Operation by driving an external power
amplifier; or it may serve as a complementary driver to a dual port antenna switch as shown in Figure 92.
If EPAEN is not required for the desired application, it may be disabled by setting R11/6 to zero.
Figure 28. Data Clock Start-up Time vs.
f
ref
Internal
Figure 29. Data Clock Start-up Time vs. Capacitor
Ratio for Crystal Reference
D
Externally Driven
f
ref
External = 12 to 26 MHz
T
A
= 25°C
1.2
0
f
ref
Internal (MHz)
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
3.6
4.0
1.0
0.8
0.6
0.4
0.2
0
D
12
0
CAPACITOR RATIO (C5/C8)
1.0
2.0
3.0
4.0
5.0
11
10
9.0
8.0
7.0
6.0
See Figure 4, T
A
= 25°C
f
ref
External = 13 MHz Crystal
f
ref
Internal = 20 kHz
F
For More Information On This Product,
n
.
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