m28w640hcb STMicroelectronics, m28w640hcb Datasheet - Page 68

• Manufacturer Part Number: m28w640hcb
• Description: 64 Mbit 4 Mb X 16, Boot Block 3 V Supply Flash Memory
• Manufacturer: STMicroelectronics

Command interface and Program/Erase controller state
Table 31.
1. Cmd = Command, Elect.Sg. = Electronic Signature, Ers = Erase, Prog. = Program, Prot = Protection, Sus = Suspend.
68/72
Read Array
(complete)
(complete)
Cmd.Error
Erase Sus
Erase Sus
Erase Sus
Erase Sus
(continue)
Prog. Sus
Read CFI
Read CFI
Read Sts
Elect.Sg.
Program
Current
Erase
Setup
Erase
Erase
Erase
state
Read
SR
bit
‘1’
‘1’
‘1’
‘1’
‘0’
‘1’
‘1’
‘1’
‘1’
‘1’
Write state machine current/next
7
Data when
Electronic
Signature
Status
Status
Status
Status
Status
Status
Read
Array
CFI
CFI
Array
(FFh)
Erase
Erase
Erase
Erase
Read
Prog.
Read
Read
Read
Read
Read
Read
Read
Read
Array
Array
Array
Array
Array
Array
Array
Array
Sus
Sus
Sus
Sus
Sus
Erase Command Error
Program Suspend to
Program
(10/40h)
Program
Program
Program
Program
Program
Program
Program
Setup
Setup
Setup
Setup
Setup
Setup
Setup
Setup
Erase (continue)
Read Array
(1)
Erase
Setup
Erase
Setup
Erase
Setup
Erase
Erase
Erase
Erase
Erase
Setup
(20h)
Read
Array
Read
Array
Read
Array
Read
Array
Sus
Sus
Sus
Sus
Command input (and next state)
(continued)
(continue)
(continue)
(continue)
(continue)
(continue)
(continue)
Confirm
Program
Erase
Erase
Erase
Erase
Erase
Erase
(D0h)
Read Array
Read Array
Read Array
Erase Sus
Erase Sus
Erase Sus
Erase Sus
Erase Sus
Prog. Sus
CmdError
Suspend
Prog/Ers
Read Sts
(B0h)
Erase
Read
Array
Read
Array
Read
Array
Read
Array
Read
Array
M28W640HCT, M28W640HCB
(continue)
(continue)
(continue)
(continue)
(continue)
(continue)
Prog/Ers
Resume
Program
Erase
Erase
Erase
Erase
Erase
(D0h)
Erase (continue)
Erase Command
Status
Status
Status
Status
Erase
Erase
Erase
Erase
Read
(70h)
Prog.
Read
Read
Read
Read
Read
Read
Read
Read
Sus
Sus
Sus
Sus
Sus
Sts
Sts
Sts
Sts
Sts
Error
Status
Erase
Erase
Erase
Erase
Clear
(50h)
Prog.
Read
Array
Read
Array
Read
Array
Read
Array
Read
Array
Read
Array
Read
Array
Read
Array
Sus
Sus
Sus
Sus
Sus