82802AB Datasheet, PDF (19/53 Pages) Intel Corporation – Firmware Hub (FWH)

Intel^® 82802AB/AC Firmware Hub
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4. Functional Descriptions
When the VPP voltage ≤ VPPLK, read operations from the status register, identifier codes or memory are
enabled, but programming and erase functions are disabled. Placing VPPH1/2 on VPP enables successful
block erase and program operations.
Table 2.
Command Definitions
Command
Bus Cycles Notes
Required
First Bus Cycle
Oper. Addr.⁽¹⁾ Data⁽²⁾
Second Bus Cycle
Oper. Addr.⁽¹⁾ Data⁽²⁾
Read Array/Reset
1
Read Identifier Codes
≥2
Read Status Register
2
Clear Status Register
1
Block Erase
2
Program
2
Block Erase and Program
1
Suspend
Block Erase and Program
1
Resume
Write
X
2
Write
X
Write
X
Write
X
3
Write
BA
3,4 Write WA
3
Write
X
3
Write
X
FFh
90h Read
IA
70h Read
X
50h
20h Write
BA
40h Write WA
or
10h
B0h
D0h
ID
SRD
D0h
WD
Note:
1. Key:
X
= Any valid address within the device
IA
= Identifier Code Address
BA
= Address within the block being erased
WA = Address of memory location to be written
SRD = Data read from status register.
WD = Data to be written at location WA
ID
= Data read from identifier codes
2. Following the Read Identifier Codes command, read operations access manufacturer and device.
See Table 4 for the read identifier code data.
3. The block must not be write locked when attempting block erase or program operations. Attempts
to issue a block erase or program to a write-locked block will fail.
4. Either 40h or 10h are recognized by the WSM as the program setup.
Note: Commands other than those shown previously are reserved by Intel for future device implementations
and should not be used.
Datasheet
19