SWRA797 September   2024 CC1312PSIP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 RF Function and Frequency Range
    2. 1.2 LP-EM-CC1312PSIP
  5. 2Software – Certified PHYs
    1. 2.1 14dBm Tx and Rx Port
      1. 2.1.1 WB-DSSS
      2. 2.1.2 TI 15.4
      3. 2.1.3 PowerG PHY
      4. 2.1.4 mioty PHY
      5. 2.1.5 WiSun PHY
    2. 2.2 20dBm Tx Port
      1. 2.2.1 WB-DSSS PHY
      2. 2.2.2 TI 15.4 PHY
      3. 2.2.3 PowerG PHY
      4. 2.2.4 mioty PHY
      5. 2.2.5 Wi-SUN PHY
  6. 3Hardware
    1. 3.1 Recommended Layout
      1. 3.1.1 4-Layer Design
      2. 3.1.2 2-Layer Design
      3. 3.1.3 GND Vias
      4. 3.1.4 Maximum Track Length
    2. 3.2 Antennas
      1. 3.2.1 Certified Antennas
      2. 3.2.2 Cross-Linking Certified Antennas
    3. 3.3 Reusing of FCC ID and IC
      1. 3.3.1 Documentation Supplied to the TCB
      2. 3.3.2 Permissive Change Policy
        1. 3.3.2.1 Class 1 Permissive Change (C1PC)
        2. 3.3.2.2 Class 2 Permissive Change (C2PC)
        3. 3.3.2.3 Class 3 Permissive Change (C3PC)
      3. 3.3.3 Changes in the FCC ID or IC
      4. 3.3.4 Re-use of FCC ID and IC Certifications Step-by-Step
    4. 3.4 Recommended Production Testing
  7. 4References

1.2 LP-EM-CC1312PSIP

To evaluate the CC1312PSIP, there is a LaunchPad available LP-EM-CC1312PSIP [4.2] and this must be plugged into a LP-XDS110 or LP-XDS110ET. Figure 1-3 shows a LP-XDS110 on the left side and a LP-EM-CC1312PSIP [4.2] on the right side.

LP-EM-CC1312PSIP Figure 1-3 LP-EM-CC1312PSIP

The FCC certification covers the frequency band of 902MHz to 928MHz but the CC1312PSIP [4.1] can also operate in the 863MHz to 876MHz ISM band.

The schematic of the radio section is shown in Figure 1-4. The components L1 and C1 are only required for operation at 20dBm at 869.525MHz or 870MHz to 876MHz, L1 must be 3.9nH and C1 must be 3.6pF.

Note: For usage at 902MHz to 928MHz and re-use of the FCC modular certification, L1 must be 100pF or 0ohm and C1 must be DNM.

If L1: 3.9nH and C1: 3.6pF are used at 902MHz to 928MHz, the output power is affected and the recommended output power settings in the SDK are invalid. Adding additional filtering on the RF output implies a Class 2 permissive change (C2PC); refer to section 3.3.2.2 for more information.

Schematic of the LP-EM-CC1312PSIP Radio Section Figure 1-4 Schematic of the LP-EM-CC1312PSIP Radio Section

When matching the antenna, a low-pass or high-pass topology of match can be used. For the CC1312PSIP [4.1] we always recommend to use a low-pass antenna match as shown in Figure 1-4 by the antenna match components of Z10 and Z11.

There is no DC block in the CC1312PSIP [4.1] so component C57 acts as a DC block if required for the antenna section. In the LP-EM-CC1312PSIP [4.2] C57 is also used to switch to the integrated PCB antenna section. If we just required connection to the SMA, then the DC block is assembled at C56 instead and C57 is DNM.