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M29W641DH10N6E Datasheet(PDF) 9 Page - STMicroelectronics |
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M29W641DH10N6E Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 42 page 9/42 M29W641DH, M29W641DL, M29W641DU VCCQ can be tied to VCC or can use a separate supply. VSS Ground. VSS is the reference for all voltage measurements. The device features two VSS pins which must be both connected to the system ground. Note: Each device in a system should have VCC, VCCQ and VPP decoupled from VSS with a 0.1µF ceramic capacitor close to the pin for current surge protection (high frequency, in- herently low inductance capacitors should be as close as possible to the device). See Figure 8, AC Measurement Load Circuit. The PCB trace widths should be sufficient to carry the required VPP program and erase currents. See Table 9, DC Characteristics. Table 2. Bus Operations Note: X = VIL or VIH. Operation E G W Address Inputs A0-A21 Data Inputs/Outputs DQ15-DQ0 Bus Read VIL VIL VIH Cell Address Data Output Bus Write VIL VIH VIL Command Address Data Input Output Disable X VIH VIH X Hi-Z Standby VIH X X X Hi-Z Read Manufacturer Code VIL VIL VIH A0 = VIL, A1 = VIL, A9 = VID, Others VIL or VIH 0020h Read Device Code VIL VIL VIH A0 = VIH, A1 = VIL, A9 = VID, Others VIL or VIH 22C7h Extended Memory Block Verify Code VIL VIL VIH A0 = VIH, A1 = VIH, A6 = VIL, A9 = VID, Others VIL or VIH 98h (factory locked, WP protects highest address block) 18h (not factory locked, WP protects highest address block) 88h (factory locked, WP protects lowest block) 08h (not factory locked, WP protects lowest block) |
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