 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LH28F800BGXX-XL12 Datasheet(PDF) 9 Page - Sharp Corporation |
|
||||||||||||||||||||||||||||||
LH28F800BGXX-XL12 Datasheet(HTML) 9 Page - Sharp Corporation |
|
|
9 / 43 page  - 9 - LH28F800BG-L/BGH-L (FOR TSOP, CSP) device selection control, and when active enables the selected memory device. OE# is the data output (DQ0-DQ15) control and when active drives the selected memory data onto the I/O bus. WE# must be at VIH and RP# must be at VIH or VHH. Fig. 11 illustrates read cycle. 3.2 Output Disable With OE# at a logic-high level (VIH), the device outputs are disabled. Output pins (DQ0-DQ15) are placed in a high-impedance state. 3.3 Standby CE# at a logic-high level (VIH) places the device in standby mode which substantially reduces device power consumption. DQ0-DQ15 outputs are placed in a high-impedance state independent of OE#. If deselected during block erase or word write, the device continues functioning, and consuming active power until the operation completes. 3.4 Deep Power-Down RP# at VIL initiates the deep power-down mode. In read modes, RP#-low deselects the memory, places output drivers in a high-impedance state and turns off all internal circuits. RP# must be held low for a minimum of 100 ns. Time tPHQV is required after return from power-down until initial memory access outputs are valid. After this wake-up interval, normal operation is restored. The CUI is reset to read array mode and status register is set to 80H. During block erase or word write modes, RP#-low will abort the operation. RY/BY# remains low until the reset operation is complete. Memory contents being altered are no longer valid; the data may be partially erased or written. Time tPHWL is required after RP# goes to logic-high (VIH) before another command can be written. As with any automated device, it is important to assert RP# during system reset. When the system comes out of reset, it expects to read from the flash memory. Automated flash memories provide status information when accessed during block erase or word write modes. If a CPU reset occurs with no flash memory reset, proper CPU initialization may not occur because the flash memory may be providing status information instead of array data. SHARP’s flash memories allow proper CPU initialization following a system reset through the use of the RP# input. In this application, RP# is controlled by the same RESET# signal that resets the system CPU. 3.5 Read Identifier Codes Operation The read identifier codes operation outputs the manufacture code and device code (see Fig. 2). Using the manufacture and device codes, the system CPU can automatically match the device with its proper algorithms. Fig. 2 Device Identifier Code Memory Map 3.6 Write Writing commands to the CUI enable reading of device data and identifier codes. They also control inspection and clearing of the status register. When VCC = VCC1/2/3/4 and VPP = VPPH1/2/3, the CUI additionally controls block erasure and word write. The Block Erase command requires appropriate command data and an address within the block to be erased. The Word Write command requires the command and address of the location to be written. 7FFFF 00002 00001 00000 Reserved for Future Implementation Device Code Manufacture Code |
Similar Part No. - LH28F800BGXX-XL12 |
|
Similar Description - LH28F800BGXX-XL12 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
