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UPSD3422EB40U6 датащи(PDF) 70 Page - STMicroelectronics |
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UPSD3422EB40U6 датащи(HTML) 70 Page - STMicroelectronics |
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70 / 300 page ![]() Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) MCU clock generation UPSD3422, UPSD3433, UPSD3434, UPSD3454 70/300 Figure 13. Clock generation logic Table 27. CCON0: clock control register (SFR F9h, reset value 50h) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 PLLM[4] PLLEN UPLLCE DBGCE CPUAR CPUPS[2:0] Table 28. CCON0 register bit definition Bit Symbol R/W Definition 7 PLLM[4] R,W Upper bit of the 5-bit PLLM[4:0] Multiplier (Default: '0' for PLLM = 00h) 6 PLLEN R,W PLL Enable 0 = Disable PLL operation 1 = Enable PLL operation (Default condition after reset) 5 UPLLCE R,W USB Clock Enable 0 = USB clock is disabled (Default condition after reset) 1 = USB clock is enabled 4DBGCE R,W Debug Unit Breakpoint Comparator Enable 0 = JTAG Debug Unit comparators are disabled 1 = JTAG Debug Unit comparators are enabled (Default condition after reset) XTAL1 /2 XTAL1 /4 XTAL1 /2048 Q Q Q M U X XTAL1 (default) XTAL1 /8 XTAL1 /16 Q Q XTAL1 /32 XTAL1 /1024 Q Q 0 1 2 3 4 5 6 7 CLK PLL EN XTAL1 (fOSC) PCON[1] CCON0[6] PCON[1]: PD, Power-Down Mode CCON[2:0], Clock Pre-Scaler Select PCON[0]: IDL, Idle Mode Clock Divider MCU_CLK (fMCU) (to: 8032, WDT) PERIPH_CLK (fOSC) (to: TIMER0/1/2, UART0/1, PCA0/1, SPI, I2C, ADC) USB_CLK 3 AI10433b Obsolete Product(s) - Obsolete Product(s) |
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