ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 147
ATmega1284PR231
Manufacturer Part Number
ATmega1284PR231
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT86RF231.pdf
(198 pages)
2.ATMEGA1284PR231.pdf
(380 pages)
3.ATMEGA1284PR231.pdf
(20 pages)
Specifications of ATmega1284PR231
Flash (kbytes)
128 Kbytes
Max. Operating Frequency
20 MHz
Max I/o Pins
32
Spi
3
Twi (i2c)
1
Uart
2
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Crypto Engine
AES
Sram (kbytes)
16
Eeprom (bytes)
4096
Operating Voltage (vcc)
1.8 to 3.6
Timers
3
Frequency Band
2.4 GHz
Max Data Rate (mb/s)
2
Antenna Diversity
Yes
External Pa Control
Yes
Power Output (dbm)
3
Receiver Sensitivity (dbm)
-101
Receive Current Consumption (ma)
13.2
Transmit Current Consumption (ma)
14.4
Link Budget (dbm)
104
- Current page: 147 of 198
- Download datasheet (5Mb)
11.5
11.5.1
11.5.2
Figure 11-11. TX Power Ramping Control for RF Front-Ends
8111C–MCU Wireless–09/09
TRX_STATE
SLP_TR
PA buffer
PA
Modulation
DIG3
DIG4
RX/TX Indicator
Overview
External RF-Front End Control
PLL_ON
0
The main features are:
While IEEE 802.15.4 is a low cost, low power standard, solutions supporting higher transmit out-
put power are occasionally desirable. To simplify the control of an optional external RF front-
end, a differential control pin pair can indicate that the AT86RF231 is currently in transmit mode.
The control of an external RF front-end is done via digital control pins DIG3/DIG4. The function
of this pin pair is enabled with register bit PA_EXT_EN (register 0x04, TRX_CTRL_1). While the
transmitter is turned off pin 1 (DIG3) is set to low level and pin 2 (DIG4) to high level. If the radio
transceiver starts to transmit, the two pins change the polarity. This differential pin pair can be
used to control PA, LNA, and RF switches.
If the AT86RF231 is not in a receive or transmit state, it is recommended to disable register bit
PA_EXT_EN (register 0x04, TRX_CTRL_1) to reduce the power consumption or avoid leakage
current of external RF switches and other building blocks, especially during SLEEP state. If reg-
ister bits PA_EXT_EN = 0, output pins DIG3/DIG4 are pulled-down to analog ground.
Using an external RF front-end including a power amplifier (PA) it may be required to adjust the
setup time of the external PA relative to the internal building blocks to optimize the overall power
spectral density (PSD) mask.
The start-up sequence of the individual building blocks of the internal transmitter is shown in
ure 11-11 on page
(SLP_TR). The radio transceiver state changes from PLL_ON to BUSY_TX and the PLL settles
• RX/TX Indicator to control an external RF Front-End
• Microcontroller independent RF Front-End Control
• Provide TX Timing Information
2
4
147, where transmission is actually initiated by the rising edge of pin 11
6
8
BUSY_TX
10
PA_BUF_LT
12
14
PA_LT
16
1 1
AT86RF231
0
1 1
18
0 0
Length [µs]
1 1
Fig-
147
Related parts for ATmega1284PR231
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Microcontroller with 128K bytes In-system programmable flash, 8 MHz, power supply =2.7 - 5.5V
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Microcontroller with 128K Bytes In-System Programmable Flash
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
IC AVR MCU 2.4GHZ XCEIVER 64QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU ATMEGA644/AT86RF230 40-DIP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
BUNDLE ATMEGA644P/AT86RF230 QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
BUNDLE ATMEGA644P/AT86RF230 TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU ATMEGA1281/AT86RF230 64-TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU, 8BIT, AVR, 16K FLASH, 28PDIP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
Microcontroller Modules MCU CARD BIGAVR6 100P W/ ATMEGA2560
Manufacturer:
mikroElektronika