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LH28F320BFE-PTTL60 Datasheet(PDF) 6 Page - Sharp Corporation |
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LH28F320BFE-PTTL60 Datasheet(HTML) 6 Page - Sharp Corporation |
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6 / 37 page  LHF32FB1 4 Table 1. Pin Descriptions Symbol Type Name and Function A0-A20 INPUT ADDRESS INPUTS: Inputs for addresses. 32M: A0-A20 DQ0-DQ15 INPUT/ OUTPUT DATA INPUTS/OUTPUTS: Inputs data and commands during CUI (Command User Interface) write cycles, outputs data during memory array, status register, query code, identifier code and partition configuration register code reads. Data pins float to high- impedance (High Z) when the chip or outputs are deselected. Data is internally latched during an erase or program cycle. CE# INPUT CHIP ENABLE: Activates the device’s control logic, input buffers, decoders and sense amplifiers. CE#-high (VIH) deselects the device and reduces power consumption to standby levels. RST# INPUT RESET: When low (VIL), RST# resets internal automation and inhibits write operations which provides data protection. RST#-high (VIH) enables normal operation. After power-up or reset mode, the device is automatically set to read array mode. RST# must be low during power-up/down. OE# INPUT OUTPUT ENABLE: Gates the device’s outputs during a read cycle. WE# INPUT WRITE ENABLE: Controls writes to the CUI and array blocks. Addresses and data are latched on the rising edge of CE# or WE# (whichever goes high first). WP#/ACC INPUT/ SUPPLY WRITE PROTECT: When WP#/ACC is VIL, locked-down blocks cannot be unlocked. Erase or program operation can be executed to the blocks which are not locked and not locked-down. When WP#/ACC is VIH, lock-down is disabled. Applying 12V±0.3V to WP#/ACC provides fast erasing or fast programming mode. In this mode, WP#/ACC is power supply pin. Applying 12V±0.3V to WP#/ACC during erase/program can only be done for a maximum of 1,000 cycles on each block. WP#/ ACC may be connected to 12V±0.3V for a total of 80 hours maximum. Use of this pin at 12V beyond these limits may reduce block cycling capability or cause permanent damage. RY/BY# OPEN DRAIN OUTPUT READY/BUSY#: Indicates the status of the internal WSM (Write State Machine). When low, WSM is performing an internal operation (block erase, full chip erase, (page buffer) program or OTP program). RY/BY#-High Z indicates that the WSM is ready for new commands, block erase is suspended and (page buffer) program is inactive, (page buffer) program is suspended, or the device is in reset mode. VCC SUPPLY DEVICE POWER SUPPLY (2.7V-3.6V): With VCC≤VLKO, all write attempts to the flash memory are inhibited. Device operations at invalid VCC voltage (see DC Characteristics) produce spurious results and should not be attempted. GND SUPPLY GROUND: Do not float any ground pins. NC NO CONNECT: Lead is not internally connected; it may be driven or floated. Rev. 2.44 |
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