ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 326

• 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

21.11.4 TCCR2B – Timer/Counter2 Control Register B
326
ATmega128RFA1
Table 21-9 WGM2 Register Bits
• Bit 7 – FOC2A - Force Output Compare A
The FOC2A bit is only active when the WGM bits specify a non-PWM mode. However,
for ensuring compatibility with future devices, this bit must be set to zero when TCCR2B
is written in PWM mode operation. When writing a logical one to the FOC2A bit, an
immediate Compare Match is forced on the Waveform Generation unit. The OC2A
output is changed according to its COM2A1:0 bits setting. Note that the FOC2A bit is
implemented as a strobe. Therefore it is the value present in the COM2A1:0 bits that
determines the effect of the forced compare. A FOC2A strobe will not generate any
interrupt, nor will it clear the timer in CTC mode using OCR2A as TOP. The FOC2A bit
is always read as zero.
• Bit 6 – FOC2B - Force Output Compare B
The FOC2B bit is only active when the WGM bits specify a non-PWM mode. However,
for ensuring compatibility with future devices, this bit must be set to zero when TCCR2B
is written in PWM mode operation. When writing a logical one to the FOC2B bit, an
immediate Compare Match is forced on the Waveform Generation unit. The OC2B
output is changed according to its COM2B1:0 bits setting. Note that the FOC2B bit is
implemented as a strobe. Therefore it is the value present in the COM2B1:0 bits that
determines the effect of the forced compare. A FOC2B strobe will not generate any
interrupt, nor will it clear the timer in CTC mode using OCR2B as TOP. The FOC2B bit
is always read as zero.
• Bit 5:4 – Res1:0 - Reserved
• Bit 3 – WGM22 - Waveform Generation Mode
Combined with the WGM21:0 bits found in the TCCR2A Register, this bit controls the
counting sequence of the counter, the source for maximum (TOP) counter value, and
what type of waveform generation to be used. See description of "TCCR2A -
Timer/Counter2 Control Register A" for details.
• Bit 2:0 – CS22:20 - Clock Select
The three Clock Select bits select the clock source to be used by the Timer/Counter2. If
external pin modes are used for the Timer/Counter2, transitions on the T2 pin will clock
Bit
NA ($B1)
Read/Write
Initial Value
Register Bits
WGM21:20
FOC2A
RW
7
0
FOC2B
RW
6
0
Res1
RW
5
0
Value
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Res0
RW
4
0
WGM22
Description
Normal mode of operation
PWM, phase correct, TOP=0xFF
CTC, TOP = OCRA
Fast PWM, TOP=0xFF
Reserved
PWM, Phase correct, TOP = OCRA
Reserved
Fast PWM, TOP=OCRA
RW
3
0
CS22
RW
2
0
CS21
RW
1
0
8266A-MCU Wireless-12/09
CS20
RW
0
0
TCCR2B