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MC13211R2 데이터시트(PDF) 7 Page - Freescale Semiconductor, Inc |
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MC13211R2 데이터시트(HTML) 7 Page - Freescale Semiconductor, Inc |
7 / 70 page MC13211/212/213 Technical Data, Rev. 1.8 Freescale Semiconductor 7 • Provides a mechanism for secured key generation • Specifies various power saving modes • Provides a simple mechanism to pair devices (such as a remote to a TV) • Ensures only authorized devices are able to communicate (a user’s remote will not turn their neighbor's TV on or off) 1.6 System Block Diagram Figure 1 shows a simplified block diagram of the MC1321x solution. Figure 1. MC1321x System Level Block Diagram 1.7 System Clock Configuration The MC321x device allows for a wide array of system clock configurations: • Pins are provided for a separate external clock source for the CPU. The external clock source can by derived from a crystal oscillator or from an external clock source • Pins are provided for a 16 MHz crystal for the modem clock source (required) • The modem crystal oscillator frequency can be trimmed through programming to maintain the tight tolerances required by the 802.15.4 Standard • The modem provides a CLKO programmable frequency clock output that can be used as an external source to the CPU. As a result, a single crystal system clock solution is possible • Out of reset, the MCU uses an internally generated clock (approximately 8-MHz) for start-up. This allows recovery from stop or reset without a long crystal start-up delay • The MCU contains an internal clock generator (which can be trimmed) that can be used to run the MCU for low power operation. This internal reference is approximately 243 kHz Transmit/Receiv e Sw itch Analog Receiv er Analog Transmitter Frequency Generator Buffer RAM IRQ Arbiter RAM Arbiter Pow er Management Voltage Regulators HCS08 CPU 16-60 KB Flash Memory 1-4 KB RAM Low Voltage Detect Key board Interrupt Internal Clock Generator Up to 32 GPIO COP 1 Channel & 4 Channel 16-bit Timers I2C 2x SCI 8 Channel 10 Bit ADC Background Debug Module RFIC Timers Digital Control Logic Dedicated SPI 802.15.4 Modem HCS08 MCU RIN_P(PAO_P) RIN_M(PAO_M) PAO_P PAO_M |
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