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2 / 10 page 2/10 ST6215L/25L 1 GENERAL DESCRIPTION 1.1 INTRODUCTION The ST6215L/25L are low voltage mask pro- grammed ROM version of ST62T15C,T25C OTP devices. They offer the same functionality as OTP devices, selecting as ROM options the options defined in the programmable option byte of the OTP version, with the exception of the LVD Reset that is not available. Figure 1. Programming wave form 1.2 ROM READOUT PROTECTION If the ROM READOUT PROTECTION option is selected, a protection fuse can be blown to pre- vent any access to the program memory content. In case the user wants to blow this fuse, high volt- age must be applied on the TEST pin. Figure 2. Programming Circuit Note: ZPD15 is used for overvoltage protection VR02001 0.5s min 15 10 5 1 4V typ 100 s max t t 4mA typ 100mA 150 s typ max TES T TES T VR02003 PROTECT ZP D15 5V V SS V DD TE S T 47 F m 100nF 100nF 15V 14V 1 |
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