ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 258

• Manufacturer Part Number: ATMEGA128RFA1-ZU
• Description: IC AVR MCU 2.4GHZ XCEIVER 64QFN
• Manufacturer: Atmel
• Series: ATMEGAr

Specifications of ATMEGA128RFA1-ZU

• Frequency: 2.4GHz
• Data Rate - Maximum: 2Mbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: General Purpose
• Power - Output: 3.5dBm
• Sensitivity: -100dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 12.5mA
• Current - Transmitting: 14.5mA
• Data Interface: PCB, Surface Mount
• Memory Size: 128kB Flash, 4kB EEPROM, 16kB RAM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VFQFN, Exposed Pad
• Rf Ic Case Style: QFN
• No. Of Pins: 64
• Supply Voltage Range: 1.8V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Processor Series: ATMEGA128x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 16 KB
• Interface Type: JTAG
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 38
• Number Of Timers: 6
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVR128RFA1-EK1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 18-5. Waveform Generation Mode Bit Description
18.9.1 Normal Mode
18.9.2 Clear Timer on Compare Match (CTC) Mode
258
Notes:
Mode
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
WGMn3
1. The CTCn and PWMn1:0 bit definition names are obsolete. Use the WGMn2:0 definitions. However, the functionality
ATmega128RFA1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
and location of these bits are compatible with previous versions of the timer.
WGMn2
(CTCn)
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
(PWMn1)
WGMn1
For detailed timing information refer to
The simplest mode of operation is the Normal mode (WGMn3:0 = 0). In this mode the
counting direction is always up (incrementing) and no counter clear is performed. The
counter simply overruns when it passes its maximum 16-bit value (MAX = 0xFFFF) and
then restarts from the BOTTOM (0x0000). In normal operation the Timer/Counter
Overflow Flag (TOVn) will be set in the same timer clock cycle as the TCNTn becomes
zero. In this case the TOVn Flag behaves like a 17
cleared. However the timer resolution can be increased by software when combined
with the timer overflow interrupt that automatically clears the TOVn Flag. There are no
special cases to consider in the Normal mode. A new counter value can be written
anytime.
The Input Capture unit is easy to use in Normal mode. However it is important to note
that the maximum interval between the external events must not exceed the resolution
of the counter. The timer overflow interrupt or the prescaler must be used to extend the
resolution for the capture unit if the intervals between events are too long.
The Output Compare units can be used to generate interrupts at some given time.
Using the Output Compare to generate waveforms in Normal mode is not
recommended because this will occupy too much CPU time.
In Clear Timer on Compare (CTC) mode (WGMn3:0 = 4 or 12), the OCRnA or ICRn
Register are used to manipulate the counter resolution. In CTC mode the counter is
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
(PWMn0)
WGMn0)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
PWM, Phase and Frequency
PWM, Phase and Frequency
(1)
PWM, Phase Correct, 10-bit
PWM, Phase Correct, 8-bit
PWM, Phase Correct, 9-bit
PWM, Phase Correct
PWM, Phase Correct
Mode of Operation
Fast PWM, 10-bit
Fast PWM, 8-bit
Fast PWM, 9-bit
Timer/Counter
(Reserved)
Fast PWM
Fast PWM
Normal
Correct
Correct
CTC
CTC
"Timer/Counter Timing Diagrams" on
th
0xFFFF
OCRnA
OCRnA
OCRnA
OCRnA
0x00FF
0x01FF
0x00FF
0x01FF
0x03FF
bit, except that it is only set and not
0x3FF
ICRn
ICRn
ICRn
ICRn
TOP
–
Immediate
Immediate
Immediate
Update of
OCRnx at
BOTTOM
BOTTOM
BOTTOM
BOTTOM
BOTTOM
BOTTOM
BOTTOM
TOP
TOP
TOP
TOP
TOP
–
8266B-MCU Wireless-03/11
TOVn Flag
page 265.
BOTTOM
BOTTOM
BOTTOM
BOTTOM
BOTTOM
BOTTOM
BOTTOM
Set on
MAX
MAX
TOP
TOP
TOP
MAX
TOP
TOP
–