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PDF W19B320BT Data sheet ( Hoja de datos )
| Número de pieza | W19B320BT | |
| Descripción | CMOS flash memory | |
| Fabricantes | Winbond | |
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W19B320BT/B DATASHEET
Table of Contents-
1.
2.
3.
4.
www.DataSheet4U.com
5.
6.
GENERAL DESCRIPTION .............................................................................................................. 4
FEATURES ...................................................................................................................................... 5
PIN CONFIGURATIONS.................................................................................................................. 7
BLOCK DIAGRAM ........................................................................................................................... 8
PIN DESCRIPTION.......................................................................................................................... 8
FUNCTIONAL DESCRIPTION ........................................................................................................ 9
6.1 Device Bus Operation ............................................................................................................. 9
6.1.1 Word/Byte Configuration ..........................................................................................................9
6.1.2 Reading Array Data ..................................................................................................................9
6.1.3 Writing Commands/Command Sequences...............................................................................9
6.1.4 Standby Mode ........................................................................................................................10
6.1.5 Automatic Sleep Mode ...........................................................................................................10
6.1.6 #RESET: Hardware Reset Pin................................................................................................10
6.1.7 Output Disable Mode..............................................................................................................11
6.1.8 autoselect Mode .....................................................................................................................11
6.1.9 Sector/Sector Block Protection and Unprotection...................................................................11
6.1.10 Write Protect (#WP)................................................................................................................11
6.1.11 Temporary Sector Unprotect ..................................................................................................12
6.1.12 Security Sector Flash Memory Region ...................................................................................12
6.1.13 Hardware Data Protection ......................................................................................................13
6.2 Command Definitions............................................................................................................ 13
6.2.1 Reading Array Data ................................................................................................................13
6.2.2 Reset Command.....................................................................................................................14
6.2.3 AUTOSELECT Command Sequence .....................................................................................14
6.2.4 Byte/Word Program Command Sequence..............................................................................15
6.2.5 Unlock Bypass Command Sequence .....................................................................................15
6.2.6 Chip Erase Command Sequence ...........................................................................................16
6.2.7 Sector Erase Command Sequence ........................................................................................16
6.2.8 Erase Suspend/Erase Resume Commands ...........................................................................17
6.3 Write Operation Status.......................................................................................................... 17
6.3.1 DQ7: #Data Polling.................................................................................................................17
6.3.2 RY/#BY: Ready/#Busy ...........................................................................................................18
6.3.3 DQ6: Toggle Bit I ....................................................................................................................18
6.3.4 DQ2: Toggle Bit II ...................................................................................................................19
6.3.5 Reading Toggle Bits DQ6/DQ2...............................................................................................19
6.3.6 DQ5: Exceeded Timing Limits ................................................................................................19
Publication Release Date: Dec. 25, 2007
- 1 - Revision A3
1 page  
W19B320BT/B DATASHEET
2. FEATURES
Performance
• 2.7~3.6-volt write (program and erase) operations
• Fast write operation
− Sector erases time: 0.4 Sec (typical)
− Chip erases time: 30Sec (typical)
www.DataSheet4U.com − Byte/Word programming time: 7/9 s (typical)
• Read access time: 70 ns
• Typical program/erase cycles: 100K
• Twenty-year data retention
• Ultra low power consumption
− Active current (Read): 10 mA (typical)
− Active current (Read while Erase): 21 mA (typical)
− Standby current: 0.2 μA (typical)
Architecture
• Sector erase architecture
− Eight 8KB, and sixty-three 64KB sectors
− Top or bottom boot block configurations available
− Supports full chip erase
• Security Sector Size: 256 Bytes
− The Security Sector is an OTP; once the sector is programmed, it cannot be erased
• JEDEC standard byte-wide and word-wide pinouts
• Manufactured on WinStack 0.13μm process technology
• Available packages: 48-pin TSOP and 48-ball TFBGA (6x8mm)
Software Features
• Compatible with common Flash Memory Interface (CFI) specification
− Flash device parameters stored directly on the device
− Allows software driver to identify and use a variety of different current and future Flash products
• Erase Suspend/Erase Resume
− Suspends erase operations to allow programming in same bank
• End of program detection
− Software method: Toggle bit/Data polling
• Unlock Bypass Program command
− Reduces overall programming time when issuing multiple program command sequences
Publication Release Date:Dec. 25, 2007
- 5 - Revisionv A3
5 Page 
W19B320BT/B DATASHEET
6.1.7 Output Disable Mode
When the #OE input is at VIH, output from the device is disabled. The output pins are set in the high
impedance state.
6.1.8 autoselect Mode
The AUTOSELECT mode offers manufacturer and device identification, as well as sector protection
verification, through identifier codes output on DQ0-DQ7. This mode is primarily intended for
www.DataSheet4U.compprrooggrraammmmiinngg
equipment to automatically match a device to be
algorithm. However, the AUTOSELECT codes can
programmed with
also be accessed
its corresponding
in-system through
the command register.
When using programming equipment, the AUTOSELECT mode requires VID (8.5V to 11.5V) on
address pins A9. Address pins A6, A1, and A0 must be as shown in table. In addition, when verifying
sector protection, the sector address must appear on the appropriate highest order address bits.
When all necessary bits have been set as required, the programming equipment may then read the
corresponding identifier code on DQ0-DQ7.
6.1.9 Sector/Sector Block Protection and Unprotection
The hardware sector protection feature disables both program and erasure operations in any sectors.
The hardware sector Unprotection feature re-enables both program and erasure operations in
previously protected sectors. Sector Protection/Unprotection can be implemented through two
methods.
The primary method requires VID on the #RESET pin, and can be implemented either in-system or through
programming equipment. This method uses standard microprocessor bus cycle timing.
The alternate method intended only for programming equipment requires VID on address pin A9 and #OE. It
is possible to determine whether a sector is protected or unprotected. See the Application Note for detail
information.
6.1.10 Write Protect (#WP)
The Write Protect function provides a hardware method to protect the certain boot sectors without
using VID. This function is one of two features provided by the #WP/ACC pin.
When the #WP/ACC pin is set at VIL, the device disables program and erase functions in the two
outermost 8 Kbytes boot sectors independently of whether those sectors were protected or
unprotected using the method described in “Sector/Sector Block Protection and Unprotection.” The
two outermost 8 Kbytes boot sectors are the two sectors containing either the lowest addresses in a
bottom-boot-configured device or the highest addresses in a top-boot-configured device.
When the #WP/ACC pin is set at VIH, the device reverts to the two outermost 8 Kbytes boot sectors
were last set either to be protected or unprotected. That is, sector Protection or Unprotection for these
two sectors depends on whether they were last protected or unprotected using the method described
in “Sector/Sector Block Protection and Unprotection”.
Please note that the #WP/ACC pin must not be left floating or unconnected; otherwise, the
inconsistent behavior of the device may occur.
- 11 -
Publication Release Date:Dec. 25, 2007
Revisionv A3
11 Page | ||
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| PDF Descargar | [ Datasheet W19B320BT.PDF ] | |
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