28F002BL-T150 データシートの表示（PDF） - Intel
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28F002BL-T150 Datasheet PDF : 42 Pages
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28F200BL-T B 28F002BL-T B
4 2 28F002BL Bus Operations
Mode
Read
Output Disable
Standby
Deep Power-Down
Intelligent Identifier (Mfr)
Intelligent Identifier (Device)
Table 3 Bus Operations
Notes RP CE OE WE
12
VIH
VIL
VIL
VIH
VIH
VIL
VIH
VIH
VIH
VIH
X
X
9
VIL
X
X
X
34
VIH
VIL
VIL
VIH
3 4 5 VIH
VIL
VIL
VIH
A9 A0 VPP
X
X
X
X
X
X
X
X
X
X
X
X
VID VIL
X
VID VIH
X
Write
6 7 8 VIH
VIL
VIH
VIL
X
X
X
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 – A17 e VIL
5 Device ID e 7CH for 28F002BL-T and 7DH for 28F002BL-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
10 The device ID codes are identical to those of the 28F002BX 5V versions and SmartVoltage equivalents
DQ0 – 7
DOUT
High Z
High Z
High Z
89H
7CH
7DH
DIN
4 3 Read Operations
The 2-Mbit flash family has three user read modes
Array Intelligent Identifier and Status Register
Status Register read mode will be discussed in detail
in the ‘‘Write Operations’’ section
During power-up conditions (VCC supply ramping) it
takes a maximum of 600 ns from VCC at 3 0V mini-
mum to obtain 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 flash family has three
control functions all of which must be logically ac-
tive to obtain data at the outputs Chip-Enable CE
is the device selection control Power-Down RP is
the device power control Output-Enable OE is the
DATA INPUT OUTPUT (DQ 0 15 or DQ 0 7 ) direc-
tion control and when active is used to drive data
from the selected memory on to the I O bus
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 lDENTlFlERS
28F200BL 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
28F200BL-T 2275H for 28F200BL-B When BYTE
is at a Iogic 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 com-
mand must be written to the CUI to return to the
read array mode
4 3 1 1 Output Control
With OE at logic-high level (VIH) the output from
the device is disabled and data input output pins
(DQ 0 15 or DQ 0 7 ) are tri-stated Data input is
then controlled by WE
18
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