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SPEAR1340 数据表(PDF) 38 Page - STMicroelectronics |
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SPEAR1340 数据表(HTML) 38 Page - STMicroelectronics |
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38 / 200 page  Device functions SPEAr1340 38/200 Doc ID 023063 Rev 4 2.38 One-time programmable antifuse (OTP) The OTP block is an array of one-time programmable antifuse memory cells. All OTP banks feature an embedded charge pump which provides internally the high voltage necessary for antifuse programming sessions. Therefore, it is not necessary to use an additional high voltage pad at the chip interface. OTP is software programmable, so no dedicated programming interface is needed at chip level. Main features: OTP embeds three 255-bit banks, with these features: ● BANK 1: 255-bit data bank with write-protect mechanism ● BANK 2: 255-bit data bank with write-protect mechanism ● BANK M: 255-bit bank, logically partitioned as follows: – 32 bits (16 + redundancy) used for BANK1/BANK2 write protection – 213 bits BootROM controlled – 2 bits reserved – 2 bits reserved for disabling TEST access to OTP – 2 bits reserved for disabling JTAG access – 4 bits BootROM controlled |
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