ATmega128RFA1 Atmel Corporation, ATmega128RFA1 Datasheet - Page 8

• Manufacturer Part Number: ATmega128RFA1
• Manufacturer: Atmel Corporation

Specifications of ATmega128RFA1

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 16 MHz
• Max I/o Pins: 38
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Analog Comparators: 1
• Crypto Engine: AES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Operating Voltage (vcc): 1.8 to 3.6
• Timers: 6
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 2
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3.5
• Receiver Sensitivity (dbm): -100
• Receive Current Consumption (ma): 16.6
• Transmit Current Consumption (ma): 18.6
• Link Budget (dbm): 103.5

4 Application Circuits
4.1 Basic Application Schematic
8
ATmega128RFA1
A basic application schematic of the ATmega128RFA1 with a single-ended RF
connector is shown in
on
port impedance using Balun B1. The capacitors C1 and C2 provide AC coupling of the
RF input to the RF port, capacitor C4 improves matching.
Figure 4-1. Basic Application schematic
The power supply bypass capacitors (CB2, CB4) are connected to the external analog
supply pin (EVDD, pin 59) and external digital supply pin (DEVDD, pin 23). Pins 34, 44
and 54 supply the digital port pins.
Floating pins can cause excessive power dissipation (e.g. during power on). They
should be connected to an appropriate source. GPIO shall not be connected to ground
or power supply directly.
The digital input pins TST and CLKI must be connected. If pin TST will never be used it
can be connected to AVSS while an unused pin CLKI could be connected to DVSS (see
chapter
RF
page 9. The 50Ω single-ended RF input is transformed to the 100Ω differential RF
C4
Pins TST & CLKI
must be connected
"Unused Pins" on page
B1
C1
C2
CX3
Figure 4-1 below
10
11
12
13
14
15
16
1
2
3
4
5
6
8
9
7
32kHz
XTAL
AVSS
RFP
RFN
AVSS
TST
RSTN
RSTON
PG0
PF7
64
17 18 19 20
63
6).
CX4
62
V
DD
61
CB1
CB2
60
21 22 23
and the associated Bill of Material in
CB3
ATmega128RFA1
59
58
CX1
CB4
57
24
XTAL
56
25 26 27 28 29 30 31 32
55
V
DD
54
CX2
53
52
8266CS-MCU Wireless-08/11
51
50
DEVDD
DEVDD
DVSS
DVSS
49
PE0
PB7
PB0
Table 4-1
48
47
44
43
40
39
36
35
46
45
42
41
38
37
34
33
CLKI