21 PVCC2 5V power supply 5.38 5.08 5.07
22 PREGND Ground 0 0.01 0.01
23 VINLD Feed control signal input 1.4 1.41 1.4
24 CTK2 External feedback loop 2.41 2.52 2.53
25 CTK1 External feedback loop 2.51 2.52 2.53
26 VINTK Trace control signal input 1.42 1.42 1.41
27 BIAS 1.4V reference voltage input 1.41 1.42 1.42
28 STBY Enable control signal 0 3.18 3.19
3.5.5 Function introduction to 24LLC020
1. State memorizer 24LLC02 (U202) is a writable and programmable read-only memorizer, with its casing
and pin function shown as the following figure 3.5.5.1:
Figure 3.5.5.1 Casing and pin function introduction
2. The function of 24LLC02 in this model is to keep some setup status of machine, such as system
information of sound and language selection, not losing after power on and still keeping the information set
last time when power on the next time. The circuit schematic diagram is shown as the figure3.5.5.2:
Figure 3.5.5.2 Circuit schematic diagram
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