I. Overview.

A9101 is a low-cost voice SOC. In the RF section, the device integrates a high sensitivity receiver and programmable power amplifier. Based on the data rate register, the user can configure live data rates from 500kbps to 2Mbps.In the digital section, it integrates a high speed pipeline 8051 microcontroller, 16kb of in-system programmable flash memory, 256 bytes of internal SRAM, 512 bytes of external SRAM and a variety of powerful features.

The A9101 Supports fast PLL settling times for frequency hopping systems. For packet processing, the A9101 has a built-in split (128 byte) TX/RXFIFO for data buffering and burst transmission, auto-ack and au- re-send, CRC for error packet filtering, FEC (7,4 Hamming code) for 1-bit data correction per code word, RSSI for clear channel evaluation, thermal sensor for monitoring relative temperature, and WOR (WakeonRX) function to Support periodic waking up from sleep mode to RX mode and listening for incoming packets without MCU interaction, data whitening for data encryption/decryption. These features are very easy to use when developing wireless systems.

II. Chip architecture demonstration diagram.

Hardware resources.

1、Main chip: A9101,package: QFN6x6 (48 pins).

2、Frequency band: 315/433/868/915MHz.

2、FSK modulation.

4、PM3 current (0.4uA,no sleep timer).

5、RX current consumption: 20mA (AGC on).

6、TX current consumption 915MHz: 80mA (17dBm) 7,Audio input: Support dual MIC and AUX.

7、Programmable data rate 500K/2Mbps programmable IF filter 2MHz/1MHz/500KHz/250KHz.

8、Programmable TX power level from -21dBm to 17dBm @ 915MHz.

9、High RX sensitivity 915MHz: -98dBm,data rate 500kbps,fast PLL settling time of frequency hopping system (60us).

10、Chip lower power RC oscillator WOR (wake up RX) function、 AGC (automatic gain control) for wider RSSI dynamic range.

11、AFC (automatic frequency compensation) for frequency drift due to temperature.

12、Support crystal oscillator (16.384MHz).

13、Low battery detector indication.

14、16KByte flash memory,256 bytes internal data RAM、512 bytes external data RAM.

15、250mW speaker driver output.

16、New channel frequency has a separate register setting.

17、CRC error packet filtering.

18、Automatic acknowledgement and automatic retransmission.

19、Separated 128-byte TX/RXFIFO.

20、8-bit RSSI measurement for clear channel indication.

21、Auto calibration and IF function.

22、FEC by (7.4) Hamming code (1-bit error correction / code word).

Software features.

1、Support basic wireless data transmission.

2、Support one-way voice transmission.

3、Support two-way voice transmission.

4、Support different frequency bands such as 315/433/868/915MHz.

5、Supporting one transmitter and multiple receivers.

6、Support two transmitting modes (direct and FIFO).

7、Support walkie-talkie type voice transmission.

8、Support for three or four channels of adaptive frequency hopping technology.

9、Support different rate working mode.

10、Support for power display.

11、Support different bit byte transmission.

12、Support pairing or no pairing.

13、Support for different crystal oscillations.

14、Support for automatic detection of the end of sending and receiving.

15、Support frequency calibration.

16、Support and other communication with modulated signal equipment to exchange data.

17、Support only send/receive.

18、Support for a variety of interrupt sources trigger.

19、Support for a variety of peripherals to work together.

21、Support for five RF mode switching.

III. Application areas.

Wireless voice (data) transmission, Low frequency band application, High and low temperature environment.

IV. Technical Support.

A full range of services such as PCB reference board diagrams and software source code and configuration sheets, demo modules and offline burning are available.  

V. The main relevant components of the program using the configuration table: