Datasheet 5X1503 (IDT) - 5

link to page 5 5X1503 Datasheet
Table 2. DFC Function Priority Mode DFC_EN I2C SDA_DFC0 SCL_HW_Mode_sel OE1_fun_sel OE2_fun_sel B17[0] Read/Write Latch B18[5] B16[6:5] B16[3:2] DFC1 DFC1 Notes
x 0 Yes x x x x x x DFC disable SW 1 Yes 1 0 00–10 00 or 10 B0[1] B0[0] Select via I2C HW 1 No 0 1 11 00–10 SCL OE1 Select via pins HW 1 No 0 1 00–10 00–10 SCL SDA Select via pins HW 1 No 0 1 11 11 OE2 OE1 Select via pins HW 1 No 0 1 11 01 — 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. ▪ Note the DFC function can also be controlled by I2C access.
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 5X1503 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 5X1503 5X1503L 5X1503S Input 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 Absolute Maximum Ratings Table 7. Absolute Maximum Ratings Thermal Characteristics Table 8. Thermal Characteristics Recommended Operating Conditions Table 9. Recommended Operating Conditions Crystal Characteristics Table 10. Embedded Crystal Characteristics DC Electrical Characteristics Table 11. DC Electrical Characteristics – Current Table 12. DC Electrical Characteristics – Input and Output Voltage AC Electrical Characteristics Table 13. AC Timing Electrical Characteristics I2C Bus DC Characteristics Table 14. I2C Bus DC Characteristics Table 15. I2C Bus AC Characteristics Spread Spectrum Generation Specifications Table 16. Spread Spectrum Generation Specifications (5X1503S only) General I2C Interface Information How to Write How to Read Glossary of Features Table 17. Glossary of Features Package Outline Drawings Ordering Information Marking Diagrams Revision History