AT86RF401U-XI Atmel, AT86RF401U-XI Datasheet - Page 17

• Manufacturer Part Number: AT86RF401U-XI
• Description: IC MICRO TX RF W/AVR 20-TSSOP
• Manufacturer: Atmel

Specifications of AT86RF401U-XI

• Frequency: 264MHz ~ 456MHz
• Applications: Garage Opener, RKE, Telemetry
• Modulation Or Protocol: ASK, OOK
• Data Rate - Maximum: 10 kbps
• Power - Output: 6dBm
• Current - Transmitting: 23.2mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Memory Size: 2KB Flash, 128 Byte EEPROM, 128Byte SRAM
• Voltage - Supply: 2 V ~ 5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Other names: AT86RF401U

1424F–RKE–12/03
Figure 6. AVR Core Architecture
The AVR uses a Harvard architecture concept, with separate memories and buses for
program and data. The program memory is executed with a two-stage pipeline. While
one instruction is being executed, the next instruction is prefetched from the program
memory. This concept enables instructions to be executed in every clock cycle. The pro-
gram memory is in-system, reprogrammable Flash memory.
With the jump and call instructions, the whole 1K word address space is directly
accessed. Most AVR instructions have a single 16-bit word format. Every program
memory address contains a 16- or 32-bit instruction.
During interrupts and subroutine calls, the return address program counter (PC) is
stored on the stack. The stack is effectively allocated in the general data SRAM, and
consequently the stack size is only limited by the total SRAM size and the usage of the
SRAM. All user programs must initialize the SP in the reset routine (before subroutines
or interrupts are executed). The 7-bit stack pointer SP is read/write accessible in the I/O
space.
The 128-byte data SRAM can be easily accessed through the five different addressing
modes supported in the AVR architecture.
The memory spaces in the AVR architecture are all linear and regular memory maps.
Control Lines
Instruction
Instruction
Program
1K x 16
Register
Decoder
Memory
Program
Counter
and Control
EEPROM
Registers
128 x 8
128 x 8
Purpose
General
SRAM
Data Bus 8-bit
Status
32 x 8
Data
ALU
AT86RF401
Battery Detector
Brown-out/Low
Programmable
Clock Divider
Transmitter
Watchdog
Bit Timer
I/O Lines
SPI Unit
Timer
RF
6
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