ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 324

• 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
324
ATmega128RFA1
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
134.
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.
(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
8266B-MCU Wireless-03/11
/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
T2S