ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 310

• 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

21.3 Timer/Counter Clock Sources
310
ATmega128RFA1
register or bit defines in a program, the precise form must be used, i.e., TCNT2 for
accessing Timer/Counter2 counter value and so on.
Figure 21-1. 8-bit Timer/Counter Block Diagram
The definitions in Table
section.
Table 21-1. Definitions
The Timer/Counter can be clocked by an internal synchronous or an external
asynchronous clock source. The clock source clk
clock, clk
source is either taken from the Timer/Counter Oscillator connected to TOSC1 and
TOSC2 or from the AMR pin. For details on asynchronous operation, see section
BOTTOM
MAX
TOP
Status flags
I/O
. When the AS2 bit in the ASSR Register is written to logic one, the clock
Timer/Counter
The counter reaches the BOTTOM when it becomes zero (0x00).
The counter reaches its MAXimum when it becomes 0xFF (decimal 255).
The counter reaches the TOP when it becomes equal to the highest value in the
count sequence. The TOP value can be assigned to be the fixed value 0xFF (MAX)
or the value stored in the OCR2A Register. The assignment is dependent on the
mode of operation.
TCNTn
OCRnx
=
ASSRn
direction
count
clear
Table 21-1 below
BOTTOM
Synchronized Status flags
= 0
Control Logic
= 0x F F
TCCRnx
TOP
asynchronous mode
select (ASn)
are also used extensively throughout the
clk T n
Synchronization Unit
T2
Prescaler
OCnx
(Int.Req.)
Generation
Waveform
is by default equal to the MCU
8266A-MCU Wireless-12/09
Oscillator
T/C
clk I/O
OCnx
clk ASY
TOVn
(Int.Req.)
clk I/O
TOSC1
TOSC2
AMR