Datasheet 5L1503 (IDT) - 5

link to page 5 5L1503 Datasheet
Table 2. DFC Function Priority Mode DFC_EN SCL_HW_Mode_sel OE1_fun_sel OE2_fun_sel B17[0] B18[5] B16[6:5] B16[3:2] Config DFC1 DFC0 Notes
x 0 x x x x x x DFC disable. HW 1 1 11 11 OTP OE2 OE1 Select via pins. HW 1 1 11 01 OE2 — OE1 Select via single pin.
DFC Function Programming
▪ Register B0b1:0 – select DFC00–DFC11 configuration. ▪ Byte5–8 are the registers for PLL VCO setting. Based on B0b1:0 configuration selection, the data write to B5–8 will be stored in selected configuration OTP memory. ▪ Refer to DFC Function Priority table. Select proper control pin(s) to activate DFC function.
PPS – Proactive Power Saving Function
PPS (Proactive Power Saving) is an IDT patented unique design for the clock generator that proactively detects end device power down state and then switches output clocks between normal operation clock frequency and low power mode 32kHz clock that only consumes < 1.5μA current. The system could save power when the device goes into power down or sleep mode. The PPS function diagram is shown as below.
Figure 3. PPS Function Block Diagram
PPS Control Power I2C Logic Down & Control Logic Low Power DCO OEn XOUT Xtal Logic XIN Oscil ator Xtal SEn Oscil ator PLL MHz / kHz Switching 5L1503 Target Device ©2019 Integrated Device Technology, Inc 5 June 19, 2019 Document Outline Description Typical Applications Features Output Features Key Specifications Block Diagram Pin Assignments Figure 1. Pin Assignments for 2.0 × 2.0 mm 10-VFQFPN Package Pin Descriptions Table 1. Pin Descriptions Device Feature and Function DFC – Dynamic Frequency Control Figure 2. DFC Function Block Diagram Table 2. DFC Function Priority DFC Function Programming PPS – Proactive Power Saving Function Figure 3. PPS Function Block Diagram Figure 4. PPS Assertion/Deassertion Timing Chart PPS Function Programming Output Divider Selection Table 3. Output Divider Selection Device Output Support 5L1503 5L1503L 5L1503S OE Pin Function Table 4. OE Pin Function Table 5. OE Pin Function Summary Table 6. PD# Priority Spread Spectrum Spread Spectrum Digital Spread Spectrum Figure 5. Digital Spread Spectrum Reference Input and Selection Crystal Input (X1/X2) Table 7. Programmable Tuning Capacitors Figure 6. Crystal Oscillator Reference Circuit Absolute Maximum Ratings Table 8. Absolute Maximum Ratings Thermal Characteristics Table 9. Thermal Characteristics Recommended Operating Conditions Table 10. Recommended Operating Conditions Crystal Characteristics Table 11. Crystal Characteristics DC Electrical Characteristics Table 12. DC Electrical Characteristics – Current Table 13. DC Electrical Characteristics – Input and Output Voltage AC Electrical Characteristics Table 14. AC Timing Electrical Characteristics I2C Bus DC Characteristics Table 15. I2C Bus DC Characteristics Table 16. I2C Bus AC Characteristics Spread Spectrum Generation Specifications Table 17. Spread Spectrum Generation Specifications (5L1503S only) General I2C Interface Information How to Write How to Read Glossary of Features Table 18. Glossary of Features Package Outline Drawings Ordering Information Marking Diagrams Revision History