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en:jethub_d1 [2022/01/22 19:54]
Dmitriy 		en:jethub_d1 [2022/02/08 21:00] (current)
Aleksandr Kazantsev [Communications]
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 ==== General characteristics ==== ==== General characteristics ====
  
-   * Quad-core Amlogic A113X (ARM Cortex-A53) processor with an operating frequency of 1.4GHz;+   * Quad-core Amlogic A113X (ARM Cortex-A53) processor with an operating frequency up to 1.4GHz;
    * RAM 512 MB or 1 GB DDR3;    * RAM 512 MB or 1 GB DDR3;
-   * Non-volatile memory eMMC flash 8 GB or 16 GB.+   * Non-volatile memory eMMC flash 8 GB, 16 GB or 32GB.
  
 Equipment options: Equipment options:
    * 512MB RAM / 8GB eMMC;    * 512MB RAM / 8GB eMMC;
-   * 1GB RAM / 16GB eMMC.+   * 1GB RAM / 16GB eMMC; 
 +   * 1GB RAM / 32GB eMMC;
  
 ==== Communications ==== ==== Communications ====
  
-   * Integrated dual-band (2.4GHz and 5GHz) AMPAK AP6255 WiFi/Bluetooth wireless module (Broadcom BCM43455). Supports IEEE 802.11a/b/g/n/ac WiFi standards as well as Bluetooth 4.2 or;+   * Integrated dual-band (2.4GHz and 5GHz) AMPAK AP6255 WiFi/Bluetooth wireless module (for controllers with 8GB and 16GB eMMC) or AMPAK AP6256 (for controllers with 32GB eMMC). Supports IEEE 802.11a/b/g/n/ac WiFi standards as well as Bluetooth 4.2 or Bluetooth 5.0 (for controllers with 32GB eMMC);
    * Ethernet IEEE 802.3 10/100 Mbps;    * Ethernet IEEE 802.3 10/100 Mbps;
    * TI CC2538 + CC2592 or TI CC2652P1 ZigBee wireless module with output power up to 20dBm and supports ZigBee 3.0 standard.    * TI CC2538 + CC2592 or TI CC2652P1 ZigBee wireless module with output power up to 20dBm and supports ZigBee 3.0 standard.
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 ===== 1-Wire ===== ===== 1-Wire =====
- 
-To implement the 1-Wire bus on the JetHome JetHub D1 controller, use the 1-Wire controller [[https://datasheets.maximintegrated.com/en/ds/DS2483.pdf|DS2483S-100]], connected to the I2C bus of the processor module (in Linux - i2c-0 bus). I2C controller address 1-Wire 0x18. 
- 
-Expansion connector pins used to connect to the 1-Wire controller (see A113 Processor Module Expansion Connector Description): 
- 
-^ Expansion connector pin ^ Purpose ^ Processor port ^ 
-| 17 | I2C_SCK | GPIOAO_10/I2C_SCK_AO | 
-| 18 | I2C_SDA | GPIOAO_11/I2C_SDA_AO | 
- 
  
 **Starting from revision 1.5 of the controller, a 3-pin terminal with a pitch of 3.5mm is used to connect the 1-Wire bus.** Purpose of the 1-Wire terminal pins: **Starting from revision 1.5 of the controller, a 3-pin terminal with a pitch of 3.5mm is used to connect the 1-Wire bus.** Purpose of the 1-Wire terminal pins:
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 | 2 | data | Data bus 1-Wire | | 2 | data | Data bus 1-Wire |
 | 3 | GND | Common wire | | 3 | GND | Common wire |
 +
 +For reliable operation of 1-Wire devices, it is recommended to connect them to the controller using a three-wire circuit (with power from +5V output).
  
 **In controller revisions up to 1.5, the 1-Wire bus is routed to an external RJ22 connector (4P4C).** RJ22 1-Wire connector pin assignment: **In controller revisions up to 1.5, the 1-Wire bus is routed to an external RJ22 connector (4P4C).** RJ22 1-Wire connector pin assignment:
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 When connecting passively powered 1-Wire devices, use pins 3 and 4 of this connector. When connecting passively powered 1-Wire devices, use pins 3 and 4 of this connector.
-To protect against electrostatic interference, a specialized TVS diode DS9503 is installed on the 1-Wire bus.+ 
 +**Starting with revision 1.8 of the JetHome JetHub D1 controller, GPIOA_14 of the Amlogic A113X processor is used to implement the 1-Wire bus.** 
 + 
 +**In revisions of the JetHome JetHub D1 controller up to 1.8, a 1-Wire chip [[https://datasheets.maximintegrated.com/en/ds/DS2483.pdf|DS2483S-100]] is used to implement the 1-Wire bus**, connected to the I2C bus of the processor module (in Linux - i2c-0 bus). I2C controller address 1-Wire 0x18. 
 + 
 +Expansion connector pins used to connect to the 1-Wire controller (see A113 Processor Module Expansion Connector Description): 
 + 
 +^ Expansion connector pin ^ Purpose ^ Processor port ^ 
 +| 17 | I2C_SCK | GPIOAO_10/I2C_SCK_AO | 
 +| 18 | I2C_SDA | GPIOAO_11/I2C_SDA_AO | 
  
 ===== Linux 1-Wire example ===== ===== Linux 1-Wire example =====
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 A description of working with 1-wire devices in Linux can be found, for example, [[https://seahu.webnode.cz/_files/200000083-58f3659ef7/How%20to%20use%201-Wire%20bus-5.pdf|here]]. A description of working with 1-wire devices in Linux can be found, for example, [[https://seahu.webnode.cz/_files/200000083-58f3659ef7/How%20to%20use%201-Wire%20bus-5.pdf|here]].
  
-To initialize the 1-Wire DS2482 driver on the controller, you need to execute the following commands (by default, in JetHome Armbian, the 1-Wire bus is configured at system boot and no additional configuration is required):+To initialize the 1-Wire DS2482 driver (on the controller of revision up to 1.8), you must execute the following commands (by default, in JetHome Armbian, the 1-Wire bus is configured at system boot and this operation is not required):
  
 <code> <code>
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 </code> </code>
  
-After that, the 1-wire devices connected to the bus will be available in the /sys/bus/w1/devices/ directory. For instance:+1-wire devices connected to the bus will be available in the /sys/bus/w1/devices/ directory. For instance:
  
 <code> <code>
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 =====Zigbee Wireless Module===== =====Zigbee Wireless Module=====
  
-The JetHome JetHub D1 controller has a Zigbee wireless communication module based on the TI CC2538 + CC2592 or TI CC2652P1 chip. See module description: [[::zb3cx_v1]] or [[::zb6c_v1]]+The JetHome JetHub D1 controller has a Zigbee wireless communication module based on the TI CC2538 + CC2592 or TI CC2652P1 chip. See module description: [[zb3cx_v1]] or [[zb6c_v1]]
  
 The module is connected to the UARTAO_B port of the processor (the device is displayed in the system as /dev/ttyAML2, in some cases as /dev/ttyAML1), hardware receive/transmit control (RTS and CTS lines) is not used. It is possible to control the hardware reset of the wireless module (RESET line) and control its boot mode (BOOT line) using the GPIO processor. The module is connected to the UARTAO_B port of the processor (the device is displayed in the system as /dev/ttyAML2, in some cases as /dev/ttyAML1), hardware receive/transmit control (RTS and CTS lines) is not used. It is possible to control the hardware reset of the wireless module (RESET line) and control its boot mode (BOOT line) using the GPIO processor.
en/jethub_d1.1642870469.txt.gz · Last modified: 2022/01/22 19:54 by Dmitriy

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