ATA5830N-PNQW Atmel, ATA5830N-PNQW Datasheet - Page 20

• Manufacturer Part Number: ATA5830N-PNQW
• Manufacturer: Atmel

Specifications of ATA5830N-PNQW

• Lead Free Status / Rohs Status: Supplier Unconfirmed

3.3
3.3.1
Figure 3-3.
20
TDCR.TXMOD
Modulator
Pin 18/ TMDI
Timer
Modulation Source
Transmit Path
Atmel ATA5830/ATA5830N
Overview
Selection
SO4TX
MOUT4TX
Transmit Data Path
TDCR.TXMS
00
01
10
11
The Atmel
options:
This section describes the hardware blocks that are integrated to perform the transmit
functionality.
Figure 3-3
The transmission data source can be selected from a register bit, a transparent input pin 18
(TMDI) and an internal 32 byte buffer.
If ASK/OOK modulation is selected the data stream is used to directly switch on and off the
power amplifier. The transmitted carrier frequency is set by the frequency synthesizer PLL.
If FSK modulation is selected the data stream is used to switch between two frequencies that
are generated by the frequency synthesizer PLL. The power amplifier is constantly on. To
reduce the occupied bandwidth a digital gauss filtering can be enabled. For data rates above
20kHz Manchester or 40kHz NRZ-coding a digital pre-emphasis filter has to be enabled to
compensate for the PLL loop filter.
TDCR.SFM
• Frequency bands 310MHz – 318MHz, 418MHz – 477MHz, 836MHz – 928MHz
• Data rates up to 80Kbit/s Manchester or 160kSym/s NRZ in transparent mode
• ASK or FSK modulation
• Transparent or buffered mode
• Gauss-shaping digital filter
ASK
FFREQ2 H/L/M
FSK
FFREQ1 H/L/M
®
shows a block diagram of the transmit data path.
1
0
ATA5830 integrates a transmitter that is capable of sending data with various
TDCR.GAEN
0
1
GACDIVH
Filtering
GACDIVL
Gauss
TDFCR
TX DSP
TDCR.PEEN
1
0
emphasis
Filtering
Pre-
TDCR.SDPU
TDCR.SDEN
TDCR.SFM
1
0
Analog Frontend
PLL
on/off
9208DS–RKE–07/11
Power
Amp