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JS48F4400P0P3C0 Datasheet(PDF) 99 Page - Numonyx B.V |
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JS48F4400P0P3C0 Datasheet(HTML) 99 Page - Numonyx B.V |
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99 / 139 page ![]() April 2008 Datasheet 309823-10 99 Numonyx™ StrataFlash® Cellular Memory (M18) Attempting to program an OTP register outside of the OTP register space causes a program error (SR4 = 1). Attempting to program a locked OTP Register causes a program error and a lock error (SR4 = 1, SR1 = 1). To read from any of the OTP registers, first issue the Read Device Information command. Then read from the desired OTP Register address offset. For additional details, refer to Section 9.4.3, “Read Device Information” on page 82. 9.11.3 Global Main-Array Protection Global main-array protection can be implemented by controlling VPP. When programming or erasing main-array blocks, VPP must be equal to, or greater than VPPL (min). When VPP is below VPPLK, program or erase operations are inhibited, thus providing absolute protection of the main array. Various methods exist for controlling VPP, ranging from simple logic control to off-board voltage control. Figure 51 shows example VPP supply connections that can be used to support program/erase operations and main-array protection. Table 47: Program OTP Register Command Bus Cycles Command Setup Write Cycle Confirm Write Cycle Address Bus Data Bus Address Bus Data Bus Program OTP Register Device Address 00C0h OTP Register Address Register Data Figure 51: Example VPP Supply Connections VCC VPP VCC • Factory Programming: VPP = VPPH • Program/Erase Protection: VPP ≤ VPPLK ≤ 10ΚΩ VCC VPP VCC • Program/Erase Enable: PROT# = VIH • Program/Erase Protection: PROT# = VIL PROT# VCC VPP VCC • Low-Voltage Programming: VPP = VPPL -or- • Factory Programming: VPP = VPPH VCC VPP VCC • Low-Voltage Programming: VPP = VCC • Program/Erase Protection: None VPPH VPPL VPPH VPPL VPPL |
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