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CD00001237 数据表(PDF) 98 Page - STMicroelectronics |
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CD00001237 数据表(HTML) 98 Page - STMicroelectronics |
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98 / 105 page  ST6215C ST6225C 98/105 TRANSFER OF CUSTOMER CODE (Cont’d) 12.6.2 ROM Version The ST6215C/25C are mask programmed 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. Figure 79. Programming Circuit Note: ZPD15 is used for overvoltage protection ROM Readout Protection. If the ROM READOUT PROTECTION option is selected, a protection fuse can be blown to prevent any access to the program memory content. In case the user wants to blow this fuse, high volt- age must be applied on the VPP pin. Figure 80. Programming wave form VR02003 VPP 5V 100nF 4.7µF PROTECT 100nF VDD VSS ZPD15 15V 14V 100 µs max 0.5s min VPP 15 14V typ 10 5 VPP 400mA 4mA typ VR02001 max 150 µs typ t 1 |
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