ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 323

• 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

21.11 Register Description
21.11.1 TIMSK2 – Timer/Counter Interrupt Mask register
8266A-MCU Wireless-12/09
The TOSC1 pin is selected by setting the EXCLKAMR bit in the ASSR register to logic
zero. Under this condition TOSC1 and TOSC2 are disconnected from Port G and a
crystal can then be connected between the TOSC1 and TOSC2 pins to serve as an
independent clock source for Timer/Counter2. The Oscillator is optimized for use with a
32.768 kHz crystal. By setting the EXCLK bit in the ASSR, a 32 kHz external clock can
be applied on TOSC1.
Setting the EXCLKAMR bit to logic one selects the AMR pin as the Timer/Counter2
clock source. Thus the 32 kHz oscillator can be used by the MAC symbol counter while
the Timer/Counter2 uses pin AMR as clock source, see
page
A complete overview of the implemented asynchronous clock sources can be found in
Table 21-6
functionality. For details about the ASSR register refer to section
below.
For Timer/Counter2, the possible pre-scaled selections are: clk
/64, clk
be selected. Setting the PSRASY bit in GTCCR resets the prescaler. This allows the
user to operate with a predictable prescaler.
Table 21-6. Asynchronous clock selection for Timer/Counter2 and Symbol-Counter
• Bit 7:3 – Res4:0 - Reserved Bit
This bit is reserved for future use. A read access always will return zero. A write access
does not modify the content.
• Bit 2 – OCIE2B - Timer/Counter2 Output Compare Match B Interrupt Enable
When the OCIE2B bit is written to one and the I-bit in the Status Register is set (one),
the Timer/Counter2 Compare Match B interrupt is enabled. The corresponding interrupt
is executed if a compare match in Timer/Counter2 occurs, i.e., when the OCF2B bit is
set in the Timer/Counter2 Interrupt Flag Register TIFR2.
Bit
NA ($70)
Read/Write
Initial Value
AS2
0
0
1
1
0
0
1
1
133.
T2S
EXCLK
/128, clk
0
1
0
1
0
1
0
1
below. The last column mentions which pins are available for GPIO
Res4
R
7
0
EXCLKAMR
T2S
/256, and clk
Res3
0
0
0
0
1
1
1
1
R
6
0
Res2
R
5
0
32 kHz crystal Osc
Timer/Counter2
TOSC1 (PG4)
clock source
T2S
AMR (PG2)
AMR (PG2)
not defined
not defined
/1024. Additionally, clk
cp2io
cp2io
Res1
R
4
0
Res0
R
3
0
32 kHz crystal Osc.
ATmega128RFA1
(TOSC1/TOSC2)
OCIE2B
RW
not defined
not defined
2
0
"MAC Symbol Counter" on
off
on
off
off
on
off
T2S
OCIE2A
RW
as well as 0 (stop) may
1
0
"Register Description"
T2S
/8, clk
TOIE2
RW
0
0
PG2, PG3, PG4
PG2, PG3, PG4
PG2, PG3, PG4
T2S
not defined
not defined
as GPIOs
PG2, PG3
PG3, PG4
/32, clk
PG2
TIMSK2
323
T2S