JS48F4400PCZ00 查看數據表（PDF） - Numonyx -> Micron
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JS48F4400PCZ00 Datasheet PDF : 102 Pages
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Numonyx™ Wireless Flash Memory (W18)
Figure 26: Word Program Flowchart
Start
Write 40h,
Word Address
Write Data
Word Address
Read Status
Register
SR[7] = 0
1
Full Program
Status Check
(if desired)
Program
Complete
Read Status
Register
SR[3] = 1
0
SR[4] = 1
0
1
SR[1] =
0
Program
Successful
WORD PROGRAM PROCEDURE
Bus
Command
Operation
Comments
Write
Program Data = 40h
Setup Addr = Location to program (WA)
Write
Data = Data to program (WD)
Data
Addr = Location to program (WA)
No
Suspend
Program
Suspend
Program
Loop
Yes
Read
Standby
Read SRD
Toggle CE# or OE# to update SRD
Check SR[7]
1 = WSM ready
0 = WSM busy
Repeat for subsequent programming operations.
Full status register check can be done after each program or
after a sequence of program operations.
FULL PROGRAM STATUS CHECK PROCEDURE
Bus
Command
Operation
Comments
VPP Range
Error
Standby
Standby
Check SR[3]
1 = VPP error
Check SR[4]
1 = Data program error
Program
Error
Device
Protect Error
Standby
Check SR[1]
1 = Attempted program to locked block
Program aborted
SR[3] MUST be cleared before the WSM will allow further
program attempts
Only the Clear Staus Register command clears SR[4:3,1].
If an error is detected, clear the status register before
attempting a program retry or other error recovery.
11.2
Factory Programming
The standard factory programming mode uses the same commands and algorithm as
the Word Program mode (40h/10h). When VPP is at VPP1, program and erase currents
are drawn through VCC. If VPP is driven by a logic signal, VPP1 must remain above the
VPP1Min value to perform in-system flash modifications. When VPP is connected to a
12 V power supply, the device draws program and erase current directly from VPP. This
eliminates the need for an external switching transistor to control the VPP voltage.
Figure 35, “Examples of VPP Power Supply Configurations” on page 77 shows examples
of flash power supply usage in various configurations.
Datasheet
60
November 2007
Order Number: 290701-18
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