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SST36VF1601G-70-4I-B3KE Datasheet(PDF) 4 Page - Silicon Storage Technology, Inc |
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SST36VF1601G-70-4I-B3KE Datasheet(HTML) 4 Page - Silicon Storage Technology, Inc |
4 / 36 page 4 Data Sheet 16 Mbit Concurrent SuperFlash SST36VF1601G / SST36VF1602G ©2006 Silicon Storage Technology, Inc. S71342-00-000 12/06 Ready/Busy# (RY/BY#) The SST36VF160xG include a Ready/Busy# (RY/BY#) output signal. RY/BY# is an open drain output pin that indi- cates whether an Erase or Program operation is in progress. Since RY/BY# is an open drain output, it allows several devices to be tied in parallel to VDD via an external pull-up resistor. After the rising edge of the final WE# pulse in the command sequence, the RY/BY# status is valid. When RY/BY# is actively pulled low, it indicates that an Erase or Program operation is in progress. When RY/BY# is high (Ready), the devices may be read or left in standby mode. Byte/Word (BYTE#) The device includes a BYTE# pin to control whether the device data I/O pins operate x8 or x16. If the BYTE# pin is at logic “1” (VIH) the device is in x16 data configuration: all data I/0 pins DQ0-DQ15 are active and controlled by CE# and OE#. If the BYTE# pin is at logic ‘0’, the device is in x8 data con- figuration -- only data I/O pins DQ0-DQ7 are active and con- trolled by CE# and OE#. The remaining data pins DQ8- DQ14 are at Hi-Z, while pin DQ15 is used as the address input A-1 for the Least Significant Bit of the address bus. Data# Polling (DQ7) When the SST36VF160xG are in an internal Program operation, any attempt to read DQ7 will produce the com- plement of true data. Once the Program operation is com- pleted, DQ7 will produce valid data. During internal Erase operation, any attempt to read DQ7 will produce a ‘0’. Once the internal Erase operation is com- pleted, DQ7 will produce a ‘1’. The Data# Polling is valid after the rising edge of fourth WE# (or CE#) pulse for Pro- gram operation. For Sector-, Block-, or Chip-Erase, the Data# Polling is valid after the rising edge of sixth WE# (or CE#) pulse. See Figure 12 for Data# Polling (DQ7) timing diagram and Figure 26 for a flowchart. Toggle Bits (DQ6 and DQ2) During the internal Program or Erase operation, any con- secutive attempts to read DQ6 will produce alternating ‘1’s and ‘0’s, i.e., toggling between ‘1’ and ‘0’. When the internal Program or Erase operation is completed, the DQ6 bit will stop toggling, and the device is then ready for the next operation. For Sector-, Block-, or Chip-Erase, the toggle bit (DQ6) is valid after the rising edge of sixth WE# (or CE#) pulse. DQ6 will be set to ‘1’ if a Read operation is attempted on an Erase-Suspended Sector or Block. If Program oper- ation is initiated in a sector/block not selected in Erase-Sus- pend mode, DQ6 will toggle. An additional Toggle Bit is available on DQ2, which can be used in conjunction with DQ6 to check whether a particular sector or block is being actively erased or erase-sus- pended. Table 2 shows detailed bit status information. The Toggle Bit (DQ2) is valid after the rising edge of the last WE# (or CE#) pulse of Write operation. See Figure 13 for Toggle Bit timing diagram and Figure 26 for a flowchart. Note: DQ7, DQ6, and DQ2 require a valid address when reading status information. The address must be in the bank where the operation is in progress in order to read the operation sta- tus. If the address is pointing to a different bank (not busy), the device will output array data. TABLE 2: Write Operation Status Status DQ7 DQ6 DQ2 RY/BY# Normal Operation Standard Program DQ7# Toggle No Toggle 0 Standard Erase 0 Toggle Toggle 0 Erase- Suspend Mode Read From Erase Suspended Sector/Block 1 1 Toggle 1 Read From Non-Erase Suspended Sector/Block Data Data Data 1 Program DQ7# Toggle N/A 0 T2.1 1342 |
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