SNAA421 November   2025 LMK05318B , LMK5B12204 , LMK5B33216 , LMK5B33414 , LMK5C33216A , LMK5C33414A

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Start Here: Using TICS Pro for Configuration and Readback
    1. 1.1 TICS Pro Status Page
    2. 1.2 TICS Pro Default Setting
  5. 2Debug Procedure: From Device Start-Up to Locked Output State
    1. 2.1 Is the APLL Reference Valid?
      1. 2.1.1 Check Status of APLL Reference
      2. 2.1.2 Debug APLL Reference
    2. 2.2 Is the APLL Locked?
      1. 2.2.1 Check Status of APLL Lock
      2. 2.2.2 Debug APLL Lock
    3. 2.3 Is the DPLL Reference Valid?
      1. 2.3.1 Check Status of DPLL Reference Validation
      2. 2.3.2 Debug DPLL Reference Validation
    4. 2.4 Is the DPLL Selecting a Reference?
      1. 2.4.1 Check Status of DPLL Reference Selection
      2. 2.4.2 Debug DPLL Reference Selection
    5. 2.5 Is the DPLL Frequency Locked?
      1. 2.5.1 Check Status of DPLL Frequency Lock
      2. 2.5.2 Debug DPLL Frequency Lock
    6. 2.6 Is the DPLL Phase Locked?
      1. 2.6.1 Check Status of DPLL Phase Lock
      2. 2.6.2 Debug DPLL Phase Lock
  6. 3Summary
  7. 4References

2.6.1 Check Status of DPLL Phase Lock

The LMK device has a DPLL phase lock detector that determines the lock state through the "loss of DPLL phase lock" or "LOPL" bit. The DPLL LOPL bit is a status flag that is used to monitor the phase lock between the input and outputs and is described in Table 2-22. The LOPL status register is listed in Table 2-23.

Table 2-22 Loss of DPLL Phase Lock - Status Bit Definition
BIT STATE MEANING DESCRIPTION
0 Undesired result The DPLL reports phase lock if the phase error between the VCO output and the DPLL input is within the LOPL lock threshold.
1 Desired result The DPLL reports unlock while the phase error exceeds the LOPL lock threshold and becomes unlocked when the phase error exceeds the LOPL unlock threshold.
Table 2-23 Loss of DPLL Phase Lock - Status Register
DEVICE FAMILY TICS PRO FIELD NAME LOSS OF DPLL PHASE LOCK
REGISTER
BAW DPLL DPLL2 DPLL1
LMK05318B, LMK05318 LOPL_DPLL R14[7] N/A N/A
LMK5B, LMK5CA, LMK5C LOPL_DPLLx R36[7] R35[7] R34[7](1)
(1) Column is not applicable for LMK5B12212 or LMK5C22212A.
Table 2-24 Loss of DPLL Phase Lock - Threshold Registers
DEVICE FAMILY LOPL - LOCK THRESHOLD
REGISTER(1)		 LOPL - UNLOCK THRESHOLD
REGISTER(1)
BAW DPLL DPLL2 DPLL1 BAW DPLL DPLL2 DPLL1
LMK05318B, LMK05318 R301[5:0] N/A N/A R302[5:0] N/A N/A
LMK5B, LMK5CA, LMK5C R603[5:0] R453[5:0] R303[5:0](2) R604[5:0] R454[5:0] R304[5:0](2)
(1) Use TICS Pro Software to configure the lock and unlock threshold register settings.
(2) Column is not applicable for LMK5B12212 or LMK5C22212A.