Datasheet > W19B320ABT8G

W19B320ABT8G

更新时间： 2023-01-03 01:47:46

品牌	Logo	应用领域
华邦 - WINBOND		光电二极管
页数	文件大小	规格书
53页	479K
描述
Flash, 2MX16, 70ns, PDSO48, 12 X 20 MM, TSOP-48

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W19B320ABT8G 数据手册

W19B320AT/B

6.1.7 #RESET: Hardware Reset Pin

The #RESET pin provides a hardware method to reset the device to reading array data. When the

#RESET pin is set to low for at least a period of t_RP, the device will immediately terminate every

operation in progress, tri-states all output pins, 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 mode.

To ensure data integrity, the interrupted operation needs to be reinitiated when the device is ready to

accept another command sequence.

Current is reduced for the duration of the #RESET pulse. When #RESET is held at V_SS± 0.3V, the

device initiates the CMOS standby current (I_CC4). If #RESET is held at V_ILbut not within V_SS± 0.3V,

the standby current will be greater.

The #RESET pin may be tied to the system-reset circuitry. Thus the system reset would also reset the

device, enabling the system to read the boot-up firmware from the device.

If #RESET is asserted during the program or erase operation, the RY/#BY pin will be at “0” (busy) until

the internal reset operation is complete. If #RESET is asserted when a program or erase operation is

not processing (RY/#BY pin is “1”), the reset operation is completed within a time of t_READY(not during

Embedded Algorithms). After the #RESET pin returns to V_IH, the system can read data t_RH.

6.1.8 Output Disable Mode

When the #OE input is at V_IH, output from the device is disabled. The output pins are set in the high

impedance state.

6.1.9 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

programming equipment to automatically match a device to be programmed with its corresponding

programming algorithm. However, the AUTOSELECT codes can also be accessed in-system through

the command register.

When using programming equipment, the AUTOSELECT mode requires V_ID(8.5V to 12.5V) 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.

6.1.10 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 V_IDon 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 V_IDon address pin A9 and #OE. It

is possible to determine whether a sector is protected or unprotected. See the Application Note for detail

information.

Publication Release Date: December 27, 2005

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Revision A4

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与W19B320ABT8G相关器件

型号	品牌	获取价格	描述	数据表
W19B320ABT8M	WINBOND	获取价格	Flash, 2MX16, 70ns, PDSO48, 12 X 20 MM, LEAD FREE, TSOP-48
W19B320ABTAM	WINBOND	获取价格	Flash, 2MX16, 70ns, PDSO48, 12 X 20 MM, LEAD FREE, TSOP-48
W19B320ABTBH	WINBOND	获取价格	Flash, 2MX16, 70ns, PDSO48, 12 X 20 MM, LEAD FREE, TSOP-48
W19B320ABTBM	WINBOND	获取价格	Flash, 2MX16, 70ns, PDSO48, 12 X 20 MM, LEAD FREE, TSOP-48
W19B320ATB	WINBOND	获取价格	4M × 8/2M × 16 BITS 3V FLEXIBLE BANK FLASH ME
W19B320ATB7H	WINBOND	获取价格	Flash, 2MX16, 70ns, PBGA48, 6 X 8 MM, 0.80 MM PITCH, LEAD FREE, TFBGA-48
W19B320ATB7L	WINBOND	获取价格	Flash, 2MX16, 70ns, PBGA48, 6 X 8 MM, 0.80 MM PITCH, TFBGA-48
W19B320ATB7M	WINBOND	获取价格	Flash, 2MX16, 70ns, PBGA48, 6 X 8 MM, 0.80 MM PITCH, LEAD FREE, TFBGA-48
W19B320ATB8H	WINBOND	获取价格	Flash, 2MX16, 70ns, PBGA48, 6 X 8 MM, 0.80 MM PITCH, LEAD FREE, TFBGA-48
W19B320ATB8L	WINBOND	获取价格	Flash, 2MX16, 70ns, PBGA48, 6 X 8 MM, 0.80 MM PITCH, TFBGA-48

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