CYWUSB6935-28SEI Cypress Semiconductor Corp, CYWUSB6935-28SEI Datasheet - Page 9

• Manufacturer Part Number: CYWUSB6935-28SEI
• Description: IC WIRELESS USB 2.4GHZ 28-SOIC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CYWUSB6935-28SEI

• Frequency: 2.4GHz
• Data Rate - Maximum: 62.5kbps
• Modulation Or Protocol: DSSS, GFSK
• Applications: AMR, ISM, RKE
• Power - Output: 0dBm
• Sensitivity: -95dBm
• Voltage - Supply: 2.7 V ~ 3.6 V
• Current - Receiving: 57.7mA
• Current - Transmitting: 69.1mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Memory Size: -
• Other names: 428-1576-5

Document 38-16008 Rev. **
Bit
7
6
5
4
3
2
1
0
Enable
Name
RX Enable
TX Enable
PN Code Select The Pseudo-Noise Code Select bit selects between the upper or lower half of the 64 chips/bit PN code.
Select
Disable
Auto Syn
Disable
Auto Syn Count
Auto PA
PA Enable
Syn Enable
RX
7
Addr: 0x03
Enable
Description
The Receive Enable bit is used to place the IC in receive mode.
The Transmit Enable bit is used to place the IC in transmit mode.
This bit applies only when the Code Width bit is set to 32 chips/bit PN codes (Reg 0x04, bit 2=1).
The Auto Synthesizer Count Select bit is used to select the method of determining the settle time of the synthesizer.
The two options are a programmable settle time based on the value in Syn Lock Count register (Reg 0x38), in units
of 2us, or by the auto detection of the synthesizer lock.
It is recommended that the Auto Syn Count Select bit is set to 1 as that guarantees a consistent settle time for the
synthesizer.
The Auto Power Amplifier Disable bit is used to determine the method of controlling the Power Amplifier. The two
options are automatic control by the baseband or by firmware through register writes.
When this bit is set to 1 the state of PA enable is directly controlled by bit PA Enable (Reg 0x03, bit 2). It is
recommended that this bit is set to 0 leaving the PA control to the baseband.
The PA Enable bit is used to enable or disable the Power Amplifier.
This bit only applies when the Auto PA Disable bit is selected (Reg 0x03, bit 3=1), otherwise this bit is don’t care.
The Auto Synthesizer Disable bit is used to determine the method of controlling the Synthesizer. The two options
are automatic control by the baseband or by firmware through register writes.
When this bit is set to 1 the state of the Synthesizer is directly controlled by bit Syn Enable (Reg 0x03, bit 0). When
this bit is set to 0 the state of the Synthesizer is controlled by the Auto Syn Count Select bit (Reg 0x03, bit 4). It is
recommended that this bit is set to 0 leaving the Synthesizer control to the baseband.
The Synthesizer Enable bit is used to enable or disable the Synthesizer.
This bit only applies when Auto Syn Disable bit is selected (Reg 0x03, bit 1=1), otherwise this bit is don’t care.
TX
1 = Receive Enabled
0 = Receive Disabled
1 = Transmit Enabled
0 = Transmit Disabled
1 = 32 Most Significant Bits of PN code are used
0 = 32 Least Significant Bits of PN code are used
1 = Synthesizer settle time is based on a count in Syn Lock Count register (Reg 0x38)
0 = Synthesizer settle time is based on the internal synthesizer lock signal
1 = Register controlled PA Enable.
0 = Auto PA Enable.
1 = Power Amplifier Enabled
0 = Power Amplifier Disabled
1 = Register controlled Synthesizer Enable.
0 = Auto Synthesizer Enable.
1 = Synthesizer Enabled
0 = Synthesizer Disabled
6
PN Code
Select
5
Count Select
PRELIMINARY
Auto Syn
Figure 7-4. Control
REG_CONTROL
4
Auto PA
Disable
3
PA Enable
2
Auto Syn
Disable
1
CYWUSB6935
Default: 0x00
Syn Enable
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