ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 241

• 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

17.9.4 TCNT0 – Timer/Counter0 Register
17.9.5 OCR0A – Timer/Counter0 Output Compare Register
8266A-MCU Wireless-12/09
The Timer/Counter Register gives direct access, both for read and write operations, to
the Timer/Counter0 unit 8-bit counter. Writing to the TCNT0 Register blocks (removes)
the Compare Match on the following timer clock. Modifying the counter (TCNT0) while
the counter is running, introduces a risk of missing a Compare Match between TCNT0
and the OCR0x Registers.
• Bit 7:0 – TCNT0_7:0 - Timer/Counter0 Byte
The Output Compare Register A contains an 8-bit value that is continuously compared
with the counter value (TCNT0). A match can be used to generate an Output Compare
interrupt, or to generate a waveform output on the OC0A pin.
• Bit 7:0 – OCR0A_7:0 - Output Compare Register
Bit
$26 ($46)
Read/Write
Initial Value
Bit
$26 ($46)
Read/Write
Initial Value
Bit
$27 ($47)
Read/Write
Initial Value
Bit
$27 ($47)
Read/Write
Initial Value
Register Bits
OCR0A_7
OCR0A_3
TCNT0_7
TCNT0_3
RW
RW
RW
RW
7
0
3
0
7
0
3
0
OCR0A_6
OCR0A_2
TCNT0_6
TCNT0_2
RW
RW
RW
RW
6
0
2
0
6
0
2
0
Value
0x04
0x05
0x06
0x07
OCR0A_5
OCR0A_1
TCNT0_5
TCNT0_1
Description
clk_IO/256 (from prescaler)
clk_IO/1024 (from prescaler)
External clock source on T0 pin, clock on
falling edge
External clock source on T0 pin, clock on
rising edge
RW
RW
RW
RW
5
0
1
0
5
0
1
0
ATmega128RFA1
OCR0A_4
OCR0A_0
TCNT0_4
TCNT0_0
RW
RW
RW
RW
4
0
0
0
4
0
0
0
OCR0A
OCR0A
TCNT0
TCNT0
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