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ST6200CB6 Folha de dados(PDF) 10 Page - STMicroelectronics |
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ST6200CB6 Folha de dados(HTML) 10 Page - STMicroelectronics |
10 / 70 page 10/70 ST62T00C/T01C ST62T03C/E01C 1.4 PROGRAMMING MODES 1.4.1 Option Bytes The two Option Bytes allow configuration capabili- ty to the MCUs. Option byte’s content is automati- cally read, and the selected options enabled, when the chip reset is activated. It can only be accessed during the programming mode. This access is made either automatically (copy from a master device) or by selecting the OPTION BYTE PROGRAMMING mode of the pro- grammer. The option bytes are located in a non-user map. No address has to be specified. EPROM Code Option Byte (LSB) EPROM Code Option Byte (MSB) D15-D11. Reserved. Must be cleared D10. Reserved. Must be set to 1. EXTCNTL. External STOP MODE control.. When EXTCNTL is high, STOP mode is available with watchdog active by setting NMI pin to one.. When EXTCNTL is low, STOP mode is not available with the watchdog active. LVD. LVD RESET enable.When this bit is set, safe RESET is performed by MCU when the supply voltage is too low. When this bit is cleared, only power-on reset or external RESET are active. PROTECT. Readout Protection. This bit allows the protection of the software contents against piracy. When the bit PROTECT is set high, readout of the OTP contents is prevented by hardware.. When this bit is low, the user program can be read. OSCIL. Oscillator selection. When this bit is low, the oscillator must be controlled by a quartz crys- tal, a ceramic resonator or an external frequency. When it is high, the oscillator must be controlled by an RC network, with only the resistor having to be externally provided. D5. Reserved. Must be cleared to zero. D4. Reserved. Must be set to one. NMI PULL. NMI Pull-Up. This bit must be set high to configure the NMI pin with a pull-up resistor. When it is low, no pull-up is provided. D2. Reserved. Must be set to 1. WDACT. This bit controls the watchdog activation. When it is high, hardware activation is selected. The software activation is selected when WDACT is low. OSGEN. Oscillator Safe Guard. This bit must be set high to enable the Oscillator Safe Guard. When this bit is low, the OSG is disabled. The Option byte is written during programming ei- ther by using the PC menu (PC driven Mode) or automatically (stand-alone mode) 70 PRO- TECT OSCIL - - NMI PULL - WDACT OS- GEN 15 8 -- - - - - EXTC- NTL LVD 10 |
Nº de peça semelhante - ST6200CB6 |
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Descrição semelhante - ST6200CB6 |
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