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S29GL01GP Datasheet(PDF) 35 Page - Cypress Semiconductor |
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S29GL01GP Datasheet(HTML) 35 Page - Cypress Semiconductor |
35 / 82 page Document Number: 002-00886 Rev. *B Page 35 of 83 S29GL01GP S29GL512P S29GL256P S29GL128P Notes 1. DQ5 switches to 1 when an Embedded Program, Embedded Erase, or Write-to-Buffer operation has exceeded the maximum timing limits. Refer toDQ5: Exceeded Timing Limits on page 35 for more information. 2. DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for further details. 3. The Data# Polling algorithm should be used to monitor the last loaded write-buffer address location. 4. DQ1 switches to 1 when the device has aborted the write-to-buffer operation 7.9 Writing Commands/Command Sequences During a write operation, the system must drive CE# and WE# to VIL and OE# to VIH when providing an address, command, and data. Addresses are latched on the last falling edge of WE# or CE#, while data is latched on the 1st rising edge of WE# or CE#. An erase operation can erase one sector, multiple sectors, or the entire device. Table – Table indicate the address space that each sector occupies. The device address space is divided into uniform 64KW/128KB sectors. A sector address is the set of address bits required to uniquely select a sector. ICC2 in “DC Characteristics” represents the active current specification for the write mode. “AC Characteristics” contains timing specification tables and timing diagrams for write operations. 7.9.1 RY/BY# The RY/BY# is a dedicated, open-drain output pin that indicates whether an Embedded Algorithm is in progress or complete. The RY/BY# status is valid after the rising edge of the final WE# pulse in the command sequence. Since RY/BY# is an open-drain output, several RY/BY# pins can be tied together in parallel with a pull-up resistor to VCC. This feature allows the host system to detect when data is ready to be read by simply monitoring the RY/BY# pin, which is a dedicated output. 7.9.2 Hardware Reset The RESET# input provides a hardware method of resetting the device to reading array data. When RESET# is driven low for at least a period of tRP (RESET# Pulse Width), the device immediately terminates any operation in progress, tristates all outputs, resets the configuration register, and ignores all read/write commands for the duration of the RESET# pulse. The device also resets the internal state machine to reading array data. To ensure data integrity Program/Erase operations that were interrupted should be reinitiated once the device is ready to accept another command sequence. When RESET# is held at VSS, the device draws VCC reset current (ICC5). If RESET# is held at VIL, but not at VSS, the standby current is greater. RESET# may be tied to the system reset circuitry which enables the system to read the boot-up firmware from the Flash memory upon a system reset. See Figure 11.7 on page 55 and Figure 11.8 on page 56 for timing diagrams. Write Operation Status Status DQ7 (Note 2) DQ6 DQ5 (Note 1) DQ3 DQ2 (Note 2) DQ1 RY/ BY# Standard Mode Embedded Program Algorithm DQ7# Toggle 0 N/A No toggle 0 0 Embedded Erase Algorithm 0 Toggle 0 1 Toggle N/A 0 Program Suspend Mode Program- Suspend Read Program-Suspended Sector Invalid (not allowed) 1 Non-Program Suspended Sector Data 1 Erase Suspend Mode Erase- Suspend Read Erase-Suspended Sector 1 No toggle 0 N/A Toggle N/A 1 Non-Erase Suspended Sector Data 1 Erase-Suspend-Program (Embedded Program) DQ7# Toggle 0 N/A N/A N/A 0 Write-to- Buffer Busy (Note 3) DQ7# Toggle 0 N/A N/A 0 0 Abort (Note 4) DQ7# Toggle 0 N/A N/A 1 0 |
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Descripción similar - S29GL01GP |
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