28F002BX-B Ver la hoja de datos (PDF) - Intel
Número de pieza
componentes Descripción
Fabricante
28F002BX-B Datasheet PDF : 48 Pages
| |||
28F200BX-T B 28F002BX-T B
4 2 28F002BX Bus Operations
Table 3 Bus Operations
Mode
Notes RP
CE OE
WE
A9 A0 VPP DQ0–7
Read
12
VIH
VIL
VIL
VIH
X
X
X DOUT
Output Disable
VIH
VIL
VIH
VIH
X
X
X High Z
Standby
VIH
VIH
X
X
X
X
X High Z
Deep Power-Down
9
VIL
X
X
X
X
X
X High Z
Intelligent Identifier (Mfr)
34
VIH
VIL
VIL
VIH
VID VIL
X
89H
Intelligent Identifier (Device) 3 4 5 VIH
VIL
VIL
VIH VID VIH X 7CH
7DH
Write
6 7 8 VIH
VIL
VIH
VIL
X
X
X DIN
NOTES
1 Refer to DC Characteristics
2 X can be VIL or VIH for control pins and addresses VPPL or VPPH for VPP
3 See DC characteristics for VPPL VPPH VHH VID voltages
4 Manufacturer and Device codes may also be accessed via a CUI write sequence A1 – A16 e X
5 Device ID e 7CH for 28F002BX-T and 7DH for 28F002BX-B
6 Refer to Table 4 for valid DIN during a write operation
7 Command writes for Block Erase or byte program are only executed when VPP e VPPH
8 Program or erase the Boot block by holding RP at VHH
9 RP must be at GND g0 2V to meet the 1 2 mA maximum deep power-down current
4 3 Read Operations
The 2-Mbit boot block flash family has three user
read modes Array Intelligent Identifier and Status
Register Status Register read mode will be dis-
cussed in detail in the ‘‘Write Operations’’ section
During power-up conditions (VCC supply ramping) it
takes a maximum of 600 ns from when VCC is at
4 5V minimum to valid data on the outputs
4 3 1 READ ARRAY
If the memory is not in the Read Array mode it is
necessary to write the appropriate read mode com-
mand to the CUI The 2-Mbit boot block flash family
has three control functions all of which must be
logically active to obtain data at the outputs
Chip-Enable CE is the device selection control
Power-Down RP is the device power control Out-
put-Enable OE is the DATA INPUT OUTPUT
(DQ 0 15 or DQ 0 7 ) direction control and when
active is used to drive data from the selected memo-
ry on to the I O bus
4 3 1 1 Output Control
(DQ 0 15 or DQ 0 7 ) are tri-stated Data input is
then controlled by WE
4 3 1 2 Input Control
With WE at logic-high level (VIH) input to the de-
vice is disabled Data Input Output pins (DQ- 0 15
or DQ 0 7 ) are controlled by OE
4 3 2 INTELLIGENT IDENTlFlERS
28F200BX Products
The manufacturer and device codes are read via the
CUI or by taking the A9 pin to 12V Writing 90H to
the CUI places the device into Intelligent Identifier
read mode A read of location 00000H outputs the
manufacturer’s identification code 0089H and loca-
tion 00001H outputs the device code 2274H for
28F200BX-T 2275H for 28F200BX-B When
BYTE is at a logic low only the lower byte of the
above signatures is read and DQ15 Ab1 is a ‘‘don’t
care’’ during Intelligent Identifier mode A read array
command must be written to the CUI to return to the
read array mode
With OE at logic-high level (VIH) the output from
the device is disabled and data input output pins
17
Share Link: 