ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 146

• 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

10.11.27 SCSR – Symbol Counter Status Register
10.11.28 SCIRQS – Symbol Counter Interrupt Status Register
146
ATmega128RFA1
This register is used to enable the backoff slot counter.
• Bit 7:5 – Res6:4 - Reserved Bit
This bit is reserved for future use. The result of a read access is undefined. The register
bit must always be written with the reset value.
• Bit 4:1 – Resx4:1 - Reserved
• Bit 0 – SCENBO - Backoff Slot Counter enable
IRQ the SCIRQM register must be updated.
• Bit 7:1 – Res6:0 - Reserved Bit
This bit is reserved for future use. The result of a read access is undefined. The register
bit must always be written with the reset value.
• Bit 0 – SCBSY - Symbol Counter busy
This bit is set if a write operation to the symbol counter register is pending. This bit is
set after writing the counter low byte (SCCNTLL) until the symbol counter is updated
with the new value. This update process can take up to 16 µs and during this time no
read or write access to the 32 bit counter register should occure.
The Interrupt Status Register indicates pending interrupt requests. If the corresponding
interrupt mask bit is set, an interrupt service routine is called and the status bit is
cleared automatically. It is also possible to clear the status bit by writing "1" to the
selected bit.
• Bit 7:5 – Res2:0 - Reserved Bit
This bit is reserved for future use. The result of a read access is undefined. The register
bit must always be written with the reset value.
• Bit 4 – IRQSBO - Backoff Slot Counter IRQ
This interrupt is generated every 320 µs, that means every 20 symbols.
• Bit 3 – IRQSOF - Symbol Counter Overflow IRQ
This interrupt is generated when the 32 bit counter turns from 0xFFFFFFF to
0x00000000.
• Bit 2 – IRQSCP3 - Compare Unit 3 Compare Match IRQ
If this bit is set, the backoff slot counter starts working. To enable the corresponding
Bit
NA ($DE)
Read/Write
Initial Value
Bit
NA ($E0)
Read/Write
Initial Value
Res2
Res6
R
7
0
R
7
0
Res1
Res5
R
6
0
R
6
0
Res0
Res4
R
5
0
R
5
0
IRQSBO IRQSOF IRQSCP3 IRQSCP2 IRQSCP1
RW
Res3
4
0
R
4
0
RW
Res2
3
0
R
3
0
RW
Res1
2
0
R
2
0
Res0
RW
1
0
R
1
0
8266B-MCU Wireless-03/11
SCBSY
RW
R
0
0
0
0
SCIRQS
SCSR