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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC312XDP512F0MPVR датащи(PDF) 70 Page - Freescale Semiconductor, Inc |
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SC312XDP512F0MPVR датащи(HTML) 70 Page - Freescale Semiconductor, Inc |
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70 / 1348 page  Chapter 1 Device Overview MC9S12XD-Family MC9S12XDP512 Data Sheet, Rev. 2.21 70 Freescale Semiconductor The configuration of the oscillator can be selected using the XCLKS signal (see Table 1-10). For a detailed description please refer to the S12CRG section. The logic level on the voltage regulator enable pin VREGEN determines whether the on-chip voltage regulator is enabled or disabled (see Table 1-11). Table 1-9. Chip Modes and Data Sources Chip Modes BKGD = MODC PE6 = MODB PE5 = MODA PK7 = ROMCTL PE3 = EROMCTL Data Source1 1 Internal means resources inside the MCU are read/written. Internal Flash means Flash resources inside the MCU are read/written. Emulation memory means resources inside the emulator are read/written (PRU registers, Flash replacement, RAM, EEPROM, and register space are always considered internal). External application means resources residing outside the MCU are read/written. Normal single chip 1 0 0 X X Internal Special single chip 0 0 0 Emulation single chip 0 0 1 X 0 Emulation memory X 1 Internal Flash Normal expanded 1 0 1 0 X External application 1 X Internal Flash Emulation expanded 0 1 1 0 X External application 1 0 Emulation memory 1 1 Internal Flash Special test 0 1 0 0 X External application 1 X Internal Flash Table 1-10. Clock Selection Based on PE7 PE7 = XCLKS Description 0 Full swing Pierce oscillator or external clock source selected 1 Loop controlled Pierce oscillator selected Table 1-11. Voltage Regulator VREGEN VREGEN Description 1 Internal voltage regulator enabled 0 Internal voltage regulator disabled, VDD1,2 and VDDPLL must be supplied externally |
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