MC13201FC Freescale Semiconductor, MC13201FC Datasheet - Page 25

• Manufacturer Part Number: MC13201FC
• Description: IC TXRX RF 2.4GHZ 32-QFN
• Manufacturer: Freescale Semiconductor

Specifications of MC13201FC

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4
• Applications: AMR, HID, HVAC, ISM
• Power - Output: -27dBm ~ 3dBm
• Sensitivity: -91dBm
• Voltage - Supply: 2 V ~ 3.4 V
• Current - Receiving: 37mA
• Current - Transmitting: 30mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-QFN
• Operating Supply Voltage: 2.7 V
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Table 10
8.7
CT_Bias is a useful signal for interface with external RF components. It must be enabled via the ct_bias_en
control bit, and then its state is determined first by the selected RF mode and then by the active state of the
radio, i.e., whether a TX or RX operation is active:
Table 11
Note that the output state is also defined in Idle, Hibernate, and Doze state as well as RX and TX operation.
Freescale Semiconductor
Bit
14
13
12
•
•
ct_bias_en
ct_bias_inv
RF_switch_mode
Single Port Operation - In this mode, the CT_Bias can be used to establish the proper DC bias
voltage to a balun depending on the RX state versus TX state as described in
Port
VDDA for TX and is at ground for RX.
Dual Port Operation - In this mode, the CT_Bias can be used as a control signal to enable a LNA
or PA or to determine the direction of an antenna switch as described in
Operation. In dual port operation, ct-bias_inv is used to control the sense of the output control, i.e.,
CT_Bias can be active high or active low for TX and vice-versa for RX.
Designation
defines the CT_Bias output state depending on control bits and operation mode of the modem.
summarizes the operation of the RF interface control bits.
RF Control Output CT_Bias
Operation. Note that in single port operation, the ct_bias_inv has no effect and CT_Bias is at
Mode
RX
RX
RX
RX
RX
TX
TX
TX
Default
0
0
0
Table 11. CT_Bias Output vs. Register Settings
CT_Bias_en
1 = CT_Bias enabled. Output state is defined by
0 = CT_Bias disabled. Output state is tri-stated.
The output state of CT_Bias under varying conditions is defined in
has effect for dual port operation.
1 = CT_Bias inverted.
0 = CT_Bias not inverted
1= Single Port Mode selected where RF switch is active and RFIN_M and RFIN_P and
bidirectional signals.
0 = Dual Port Mode selected where RFIN_M and RFIN_P are inputs only and PAO_P
and PAO_N are separate outputs.
(This is default operation).
1
1
1
0
1
1
1
1
Table 10. RF Interface Control Bits
MC13201 Technical Data, Rev. 1.3,
RF_switch_mode
X
1
1
0
1
1
1
0
CT_Bias_inv
Operation
X
0
1
0
0
0
1
0
Table
0
0
0
Hi-Z
1
1
1
1
11.
CT_Bias
Section 8.5.2, “Dual Port
Section 8.5.1, “Single
Table
11. This bit only
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