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參數(shù)資料
| 型號： | MC13180 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | 2.4 GHz Low Power Wireless Transceiver IC for Bluetooth⑩ Applications |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQCC48 |
| 封裝： | PLASTIC, QFN-48 |
| 文件頁數(shù)： | 47/58頁 |
| 文件大小： | 992K |
| 代理商： | MC13180 |
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Functional Description
MOTOROLA
MC13180
Product Preview
47
4.39 External Antenna Switch
An external antenna switch, shown in Figure 42, 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 MC13180 device. When GPO is high, the switch is set to
transmit mode. EPAEN serves as a complementary driver in this configuration. See Applications
Information General Purpose Output and External Power Amplifier for further discussion.
4.40 General Purpose Output (GPO) Pin
The MC13180 General Purpose Output (GPO) is located at Pin 9 of the device. Its output is programmed
for general use by setting bit R2/8 in the register map. The GPO can serve as a control line for an external
antenna switch.
4.41 External Power Amplifier Enable (EPAEN) Pin
The External Power Amplifier Enable (EPAEN) output of MC13180 is located at Pin 4 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 seen in Figure 42. If
EPAEN is not required for the desired application, it may be disabled by setting R11/6 to zero.
Figure 38. Ramp Generator (Transmit Cycle) Timing Diagram
RTXEN
EPADAC (R9/7 = 1)
GPO (Antenna Switch)
EPAEN (R11/6 = 1)
Internal PA Enable
Power Ramp
Transmit Sync Delay
(R8/15-8 = 184
10
)
106 μs
44 μs
1.0 μs
4.0 μs
5.0 μs
20 μs
20 μs
184
10
15
μs
15 μs
1.0
μs
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