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EN29PL064 Datasheet(PDF) 9 Page - Eon Silicon Solution Inc. |
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EN29PL064 Datasheet(HTML) 9 Page - Eon Silicon Solution Inc. |
9 / 57 page This Data Sheet may be revised by subsequent versions ©2004 Eon Silicon Solution, Inc., www.eonssi.com or modifications due to changes in technical specifications. 9 EN29PL064 Rev. K, Issue Date: 2010/12/27 8. Logic Symbol 9. Device Bus Operations This section describes the requirements and use of the device bus operations, which are initiated through the internal command register. The command register itself does not occupy any addressable memory location. The register is a latch used to store the commands, along with the address and data information needed to execute the command. The contents of the register serve as inputs to the internal state machine. The state machine outputs dictate the function of the device. Table 9.1 lists the device bus operations, the inputs and control levels they require, and the resulting output. The following subsections describe each of these operations in further detail. Table 9.1 Device Bus Operations Operation CE# OE# WE# RESET# WP#/ACC Addresses (Amax–A0) DQ15– DQ0 Read L L H H X AIN DOUT Write L H L H X (Note 2) AIN DIN Standby Vcc±0.3 V X X Vcc ±0.3 V X (Note 2) X High-Z Output Disable L H H H X X High-Z Reset X X X L X X High-Z Temporary Sector Unprotect (High Voltage) X X X VID X AIN DIN Legend: L = Logic Low = VIL, H = Logic High = VIH, VID = VHH = 8.5–9.5 V, X = Don’t Care, SA = Sector Address, AIN = Address In, DIN = Data In, DOUT = Data Out Notes 1. The sector protect and sector unprotect functions may also be implemented via programming equipment. See High Voltage Sector Protection 2. WP#/ACC must be high when writing to upper two and lower two sectors. |
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