Electronic Components Datasheet Search |
|
SST34HF1602S-70-4E-B1PE Datasheet(PDF) 2 Page - Silicon Storage Technology, Inc |
|
SST34HF1602S-70-4E-B1PE Datasheet(HTML) 2 Page - Silicon Storage Technology, Inc |
2 / 38 page 2 Advance Information 16 Mbit Concurrent SuperFlash + 2/4/8 Mbit SRAM ComboMemory SST34HF1602C / SST34HF1622C / SST34HF1642C SST34HF1642D / SST34HF1682D / SST34HF1622S / SST34HF1642S ©2004 Silicon Storage Technology, Inc. S71256-00-000 3/04 protect against inadvertent flash write, the SST34HF16x2C/D/S devices contain on-chip hardware and software data protection schemes. The flash and (P)SRAM operate as two independent mem- ory banks with respective bank enable signals. The mem- ory bank selection is done by two bank enable signals. The (P)SRAM bank enable signals, BES1# and BES2, select the (P)SRAM bank (BES1# and BES2 are NC for SST34HF1602C). The flash memory bank enable signal, BEF#, has to be used with Software Data Protection (SDP) command sequence when controlling the Erase and Pro- gram operations in the flash memory bank. The memory banks are superimposed in the same memory address space where they share common address lines, data lines, WE# and OE# which minimize power consumption and area. Designed, manufactured, and tested for applications requir- ing low power and small form factor, the SST34HF16x2C/ D/S are offered in both commercial and extended tempera- tures and a small footprint package to meet board space constraint requirements. See Figures 3 and 4 for pin assignments. Device Operation The SST34HF16x2C/D/S uses BES1#, BES2 and BEF# to control operation of either the flash or the (P)SRAM memory bank. When BEF# is low, the flash bank is acti- vated for Read, Program or Erase operation. When BES1# is low, and BES2 is high the (P)SRAM is activated for Read and Write operation. BEF# and BES1# cannot be at low level, and BES2 cannot be at high level at the same time. If all bank enable signals are asserted, bus contention will result and the device may suffer permanent dam- age. All address, data, and control lines are shared by flash and (P)SRAM memory banks which minimizes power con- sumption and loading. The device goes into standby when BEF# and BES1# bank enables are raised to VIHC (Logic High) or when BEF# is high and BES2 is low. Concurrent Read/Write Operation Dual bank architecture of SST34HF16x2C/D/S devices allows the Concurrent Read/Write operation whereby the user can read from one bank while programming or eras- ing in the other bank. This operation can be used when the user needs to read system code in one bank while updat- ing data in the other bank. See Figures 1 and 2 for dual- bank memory organization. Note: For the purposes of this table, write means to Block-, Sector, or Chip-Erase, or Word-/Byte-Program as applicable to the appropriate bank. Flash Read Operation The Read operation of the SST34HF16x2C/D/S is con- trolled by BEF# and OE#, both have to be low for the sys- tem to obtain data from the outputs. BEF# is used for device selection. When BEF# is high, the chip is dese- lected and only standby power is consumed. OE# is the output control and is used to gate data from the output pins. The data bus is in high impedance state when either BEF# or OE# is high. Refer to the Read cycle timing diagram for further details (Figure 8). CONCURRENT READ/WRITE STATES Flash (P)SRAM Bank 1 Bank 2 Read Write No Operation Write Read No Operation Write No Operation Read No Operation Write Read Write No Operation Write No Operation Write Write |
Similar Part No. - SST34HF1602S-70-4E-B1PE |
|
Similar Description - SST34HF1602S-70-4E-B1PE |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |