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M29W040-120N6TR Datasheet(PDF) 11 Page - STMicroelectronics |
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M29W040-120N6TR Datasheet(HTML) 11 Page - STMicroelectronics |
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11 / 31 page  Symbol Alt Parameter Test Condition M29W040 Unit -150 -200 VCC = 2.7V to 3.6V VCC = 2.7V to 3.6V Min Max Min Max tAVAV tRC Address Valid to Next Address Valid E= VIL,G = VIL 150 200 ns tAVQV tACC Address Valid to Output Valid E = VIL,G = VIL 150 200 ns tELQX (1) tLZ Chip Enable Low to Output Transition G= VIL 00 ns tELQV (2) tCE Chip Enable Low to Output Valid G = VIL 150 200 ns tGLQX (1) tOLZ Output Enable Low to Output Transition E=VIL 00 ns tGLQV (2) tOE Output Enable Low to Output Valid E=VIL 55 70 ns tEHQX tOH Chip Enable High to Output Transition G= VIL 00 ns tEHQZ (1) tHZ Chip Enable High to Output Hi-Z G = VIL 40 50 ns tGHQX tOH Output Enable High to Output Transition E=VIL 00 ns tGHQZ (1) tDF Output Enable High to Output Hi-Z E=VIL 40 50 ns tAXQX tOH Address Transition to Output Transition E= VIL,G = VIL 00 ns Notes: 1. Sampled only, not 100% tested. 2. G may be delayed by up to tELQV -tGLQV after the falling edge of E without increasing tELQV. Table 12B. Read AC Characteristics (TA = 0 to 70 °C, –20 to 85°C or –40 to 85°C) Read Array/Reset (RST) instruction. The Reset instruction consists of one write operation giving the command F0h. It can be optionally preceded by the two coded cycles. A wait state of 5 µs before read operationsis necessaryif the Reset command is applied during an Erase or Power Down opera- tion. Read Electronic Signature (RSIG) instruction. This instruction uses the two coded cycles followed by one write cycle giving the command 90h to address 5555h for command setup. A subsequent read will output the manufacturer code, the device code or the Block Protection status depending on the levels of A0, A1, A6, A16, A17 and A18. The manufacturer code, 20h, is output when the ad- dresses lines A0, A1 and A6 are Low, the device code, E2h is output when A0 is High with A1 and A6 Low. Read Block Protection (RBP) instruction. The use of Read ElectronicSignature(RSIG) command also allows access to the Block Protection status verify. After giving the RSIG command, A0 and A6 are set to VIL with A1 at VIH, while A16, A17 and A18 define the block of the block to be verified. A read in these conditions will output a 01h if block is protected and a 00h if block is not protected. This Read Block Protection is the only valid way to check the protection status of a block. Neverthe- less, it must not be used during the block protection phase as a method to verify the Block Protection. Please refer to Block Protection paragraph. Power Down (PD) instruction. The Power Down instruction uses one write cycle to put the memory into a power down mode where current consump- tion is typically reduced to less than 1.0 µA. Once in this state, a Reset (RST) command must be written to the P/E.C. prior to any operation. 11/31 M29W040 |
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