SM28VLT32-HT Datasheet, PDF (10/16 Pages) Texas Instruments – 32-MBIT HIGH-TEMPERATURE FLASH MEMORY WITH SERIAL PERIPHERAL INTERFACE (SPI) BUS

SM28VLT32-HT
SLVSAO2C – NOVEMBER 2012 – REVISED MARCH 2013
www.ti.com
Table 3. Serial Peripheral Interface (SPI) Data Frame⁽¹⁾
COMMAND NAME
COMMAND
BYTE ON SI
Read Word
15h
Read Word with
auto addressing
16h
Write Word
17h
Write Word with
auto addressing
18h
Erase Segment⁽³⁾
19h
Read Status
Register
22
Validate Segment
1A
Write Register
1D
ADDRESS
BYTES ON SI
3
0
3
0
3
0
3
3
DATA BYTES
ON SI
0
0
2
2
0
0
0
2
Read Register
1E
3
0
Write Command
1F
0
2
DUMMY
BYTES ON
SI ⁽²⁾
1 (3)
1 (3)
1 (1)
1 (1)
1 (1)
0 (2)
1 (1)
1 (1)
1 (3)
1 (1)
DATA BYTES TOTAL BYTES
ON SO
IN FRAME
DESCRIPTION
2
7
Read word at given address
2
4
Burst read from previous
address
0
7
Write word at given address
0
4
Burst write from previous
address
0
5
Erase addressed segment
2
3
Read SPI status register
0
5
Validates addressed segment
0
7
Writes to address in
configuration register
2
7
Reads from address in
configuration register
Flash controller command
0
4
interface for special functions.
See Application Information
section.
(1) Multi-byte inputs and results are MSB first, LSB last.
(2) (#) indicates total number of dummy SI bytes including overlap with SO output.
(3) Permanent damage to flash array may occur if erase is executed when T_J exceeds 125°C.
REGISTER DEFINITIONS
BITS
7
6
5
4
3
2
1
0
DEFAULT
VALUE
0
0
0
0
0
0
0
0
Table 4. Quick Status Register
TYPE
R
R
R
R
R
R
R
R
DESCRIPTION
Unused
SPI Frame error: indicates frame ended with less than required
bytes to complete
Write Busy: indicates that a program operation is in progress
Erase Busy: indicates that a sector is being erased
Device Busy
Invalid Data: indicates that an attempt was made to set a bit to 1
that has already been programmed to 0
Read error: indicates that read was attempted on address when
data was not available
Command error: indicates that a prior command failed. Must be
cleared.
BITS
15:12
11:08
7
6
5
4
3
2
1
0
DEFAULT
VALUE
0
RevID
0
0
0
0
0
0
0
0
Table 5. Status Register (Command 22h)
TYPE
R
R
R
R
R
R
R
R
R
R
DESCRIPTION
Reserved
Revision ID (current revision 1001)
Unused
Read Busy
Write Busy
Erase Busy
Write Suspend
Erase Suspend
Flash Pump Ready
SPI Frame error
10
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