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ST92F120JR9T 数据表(PDF) 110 Page - STMicroelectronics |
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ST92F120JR9T 数据表(HTML) 110 Page - STMicroelectronics |
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110 / 320 page ![]() 110/320 ST92F120 - RESET AND CLOCK CONTROL UNIT (RCCU) CERAMIC RESONATORS Murata Electronics CERALOCK resonators have been tested with the ST92F120 at 3, 3.68, 4 and 5 MHz. Some resonators have built-in capacitors (see Table 25). The test circuit is shown in Figure 54. Figure 54. Test circuit Table 25 shows the recommended conditions at different frequencies. Table 25. Obtained Results Advantages of using ceramic resonators: CST and CSTCC types have built-in loading ca- pacitors (those with values shown in parentheses ()). Rp is always open in the previous table because there is no need for a parallel resistor with a reso- nator (it is needed only with a crystal). Test conditions: The evaluation conditions are 4.5 to 5.5 V for the supply voltage and -40 ° to 105° C for the tempera- ture range. Caution: The above circuit condition is for design reference only. Recommended C1, C2 value depends on the cir- cuit board used. VDD C1 C2 OSCIN CERALOCK ST92F120 V2 V1 Rp Rd OSCOUT VSS Freq. (MHz) Parts Number C1 (PF) C2 (PF) Rp (Ohm) Rd (Ohm) 3 CSA3.00MG 30 30 Open 0 CST3.00MGW (30) (30) Open 0 3.68 CSA3.68MG 30 30 Open 0 CST3.68MGW (30) (30) Open 0 CSTCC3.68MG (15) (15) Open 0 4 CSA4.00MG 30 30 Open 0 CST4.00MGW (30) (30) Open 0 CSTCC4.00MG (15) (15) Open 0 5 CSA5.00MG 30 30 Open 0 CST5.00MGW (30) (30) Open 0 CSTCC5.00MG (15) (15) Open 0 9 |
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