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STR736FV0T7 bảng dữ liệu(PDF) 4 Page - STMicroelectronics |
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STR736FV0T7 bảng dữ liệu(HTML) 4 Page - STMicroelectronics |
4 / 40 page Introduction STR73xF 4/40 High Speed Flash Memory The Flash program memory is organized in 32-bit wide memory cells which can be used for storing both code and data constants. It is accessed by CPU with zero wait states @ 36 MHz. The STR7 embedded Flash memory can be programmed using In-Circuit Programming or In-Application programming. The Flash memory endurance is 10K write/erase cycles and the data retention is 20 years at 55°C. IAP (In-Application Programming): The IAP is the ability to re-program the Flash memory of a microcontroller while the user program is running. ICP (In-Circuit Programming): The ICP is the ability to program the Flash memory of a microcontroller using JTAG protocol while the device is mounted on the user application board. The Flash memory can be protected against different types of unwanted access (read/write/erase). There are two types of protection: ● Sector Write Protection ● Flash Debug Protection (locks JTAG access) Flexible Power Management To minimize power consumption, you can program the STR73xF to switch to SLOW, WFI LPWFI, STOP or HALT modes depending on the current system activity in the application. Flexible Clock Control Two clock sources are used to drive the microcontroller, a main clock driven by an external crystal or ceramic resonator and an internal backup RC oscillator that operates at 2MHz or 32 kHz. The embedded PLL can be configured to generate an internal system clock of up to 36 MHz. The PLL output frequency can be programmed using a wide selection of multipliers and dividers. Voltage Regulators The STR73xF requires an external 4.5 to 5.5V power supply. There are two internal Voltage Regulators for generating the 1.8V power supply needed by the core and peripherals. The main VR is switched off and the Low Power VR switched on when the application puts the STR73xF in Low Power Wait for Interrupt (LPWFI) mode. Low Voltage Detectors The voltage regulator and Flash modules each have an embedded LVD that monitors the internal 1.8V supply. If the voltage drops below a certain threshold, the LVD will reset the STR73xF. Note: An external power-on reset must be provided ensure the microcontroller starts-up correctly. |
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