ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 41
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
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7.1.4.4
7.1.4.5
8111C–MCU Wireless–09/09
BUSY_TX and RX_ON States
Reset Procedure
The transition from PLL_ON to BUSY_TX state and subsequent to RX_ON state is shown in
Figure 7-6 on page
Figure 7-6.
Starting from PLL_ON state it is further assumed that the PLL is already locked. A transmission
is initiated either by a rising edge of pin 11 (SLP_TR) or by command TX_START. The PLL set-
tles to the transmit frequency and the PA is enabled.
t
the internally generated SHR is transmitted. After that the PSDU data are transmitted from the
Frame Buffer.
After completing the frame transmission, indicated by IRQ_3 (TRX_END), the PLL settles back
to the receive frequency within t
If during TX_BUSY the radio transmitter is programmed to change to a receive state it automati-
cally proceeds the state change to RX_ON state after finishing the transmission.
The radio transceiver reset procedure is shown in
Figure 7-7.
Note:
TR10
= 16 µs after initiating the transmission the AT86RF231 changes into BUSY_TX state and
Pin
State
Block
Command
Time
Event
State
Block
Pin /RST
Time
Timing figure t
Timing Characteristics” on page
PLL_ON to BUSY_TX to RX_ON Timing
Reset Procedure
various
XOSC, DVREG
PLL_ON
41.
TR13
0
PLL
or command TX_START
refers to
>t10
SLP_TR
TR11
Table 7-1 on page
0
x
= 32 µs in state PLL_ON.
t
157.
TR10
PA
x + 10
>t11
16
BUSY_TX
t
TR13
42, t
Figure 7-7 on page
FTN
PA, TX
10
, t
11
RX_ON
x + 40
refers to
XOSC, DVREG
[IRQ_4 (AWAKE_END)]
TRX_OFF
Section 12.4 “Digital Interface
x
RX_ON
41.
t
PLL
TR11
AT86RF231
x + 32
Time [µs]
RX
Time [µs]
41
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