W19B320ABT7H Winbond Electronics, W19B320ABT7H Datasheet - Page 9

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W19B320ABT7H

Manufacturer Part Number
W19B320ABT7H
Description
IC FLASH 32MBIT 70NS 48TSOP
Manufacturer
Winbond Electronics
Datasheet

Specifications of W19B320ABT7H

Format - Memory
FLASH
Memory Type
FLASH
Memory Size
32M (4Mx8, 2Mx16)
Speed
70ns
Interface
Parallel
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
-20°C ~ 85°C
Package / Case
48-TSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Part Number
Manufacturer
Quantity
Price
Part Number:
W19B320ABT7H
Manufacturer:
WINBOND
Quantity:
813
Part Number:
W19B320ABT7H
Manufacturer:
WINBOND/华邦
Quantity:
20 000
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
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
device initiates the CMOS standby current (I
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
Embedded Algorithms). After the #RESET pin returns to V
6.1.8 Output Disable Mode
When the #OE input is at V
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
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
programming equipment. This method uses standard microprocessor bus cycle timing.
The alternate method intended only for programming equipment requires V
is possible to determine whether a sector is protected or unprotected. See the Application Note for detail
information.
IH
, output from the device is disabled. The output pins are set in the high
ID
on the
#RESET
CC4
pin, and can be implemented either in-system or through
). If #RESET is held at V
- 9 -
RP
, the device will immediately terminate every
IH
, the system can read data t
Publication Release Date: December 27, 2005
ID
on address pin A9 and
IL
W19B320AT/B
but not within V
ID
(8.5V to 12.5V) on
READY
RH.
SS
±
(not during
Revision A4
SS
0.3V, the
±
#OE.
0.3V,
It

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