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IS29LV032B Datasheet(PDF) 11 Page - Integrated Silicon Solution, Inc |
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IS29LV032B Datasheet(HTML) 11 Page - Integrated Silicon Solution, Inc |
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11 / 47 page  IS29LV032T/B Integrated Silicon Solution, Inc.- www.issi.com Rev. D 07/16/2014 11 USER MODE DEFINITIONS Word / Byte Configuration The signal set on the BYTE# pin controls whether the device data I/O pins DQ15-DQ0 operate in the byte or word configuration. When the BYTE# Pin is set at logic ‘1’, then the device is in word configuration, DQ15-DQ0 are active and are controlled by CE# and OE#. On the other hand, if the BYTE# Pin is set at logic ‘0’, then the device is in byte configuration, and only data I/O pins DQ0-DQ7 are active and controlled by CE# and OE#. The data I/O pins DQ8-DQ14 are tri-stated, and the DQ15 pin is used as an input for the LSB (A-1) address function. Standby Mode The IS29LV032T/B has a CMOS-compatible standby mode, which reduces the current to < 1µA (typical). It is placed in CMOS-compatible standby when the CE# pin is at VCC ± 0.5. RESET# and BYTE# pin must also be at CMOS input levels. The device also has a TTL-compatible standby mode, which reduces the maximum VCC current to < 1mA. It is placed in TTL-compatible standby when the CE# pin is at VIH. When in standby modes, the outputs are in a high-impedance state independent of the OE# input. Automatic Sleep Mode The IS29LV032T/B has an automatic sleep mode, which minimizes power consumption. The devices will enter this mode automatically when the states of address bus remain stable for tacc + 30ns. ICC4 in the DC Characteristics table shows the current specification. With standard access times, the device will output new data when addresses change. Read Mode The device is automatically set to reading array data after device power-up or hardware reset. No commands are required to retrieve data. The device is also ready to read array data after completing an Embedded Program or Embedded Erase algorithm. After the device accepts a Sector Erase Suspend command, the device enters the Sector Erase Suspend mode. The system can read array data using the standard read timings, except that if it reads at an address within erase-suspended sectors, the device outputs status data. After completing a programming operation in the Sector Erase Suspend mode, the system may once again read array data with the same exception. See “Sector Erase Suspend/Resume Commands” for more additional information. The system must issue the reset command to re-enable the device for reading array data if DQ5 goes high or while in the autoselect mode. See the “Reset Command” for additional details. Output Disable Mode When the OE# pin is at a logic high level (VIH), the output from the IS29LV032T/B is disabled. The output pins are placed in a high impedance state. Autoselect Identification Mode The autoselect mode provides manufacturer and device identification, and sector protection verification, through identifier codes output on DQ15 –DQ0. This mode is primarily intended for programming equipment to automatically match a device to be programmed with its corresponding programming algorithm. However, the autoselect codes can also be accessed in-system through the command register. |
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