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参数资料
| 型号： | PH28F128W18BD60A |
| 厂商： | INTEL CORP |
| 元件分类： | PROM |
| 英文描述： | 8M X 16 FLASH 1.8V PROM, 60 ns, PBGA56 |
| 封装： | 9 X 11 MM, 1 MM HEIGHT, LEAD FREE, VFBGA-56 |
| 文件页数： | 72/106页 |
| 文件大小： | 1496K |
| 代理商： | PH28F128W18BD60A |
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Intel
Wireless Flash Memory (W18)
07-Dec-2005
Intel Wireless Flash Memory (W18)
Datasheet
68
Order Number: 290701, Revision: 015
11.3.2
Setup
After receiving the EFP Setup (30h) and EFP Confirm (D0h) command sequence, SR[7] transitions
from a 1 to a 0 indicating that the WSM is busy with EFP algorithm startup. A delay before
checking SR[7] is required to allow the WSM time to perform all of its setups and checks (VPP
level and block lock status). If an error is detected, Status Register bits SR[4], SR[3], and/or SR[1]
are set and EFP operation terminates.
Note:
After the EFP Setup and Confirm command sequence, reads from the device automatically output
Status Register data. Do not issue the Read Status Register command; it will be interpreted as data
to program at WA0.
11.3.3
Program
After setup completion, the host programming system must check SR[0] to determine “data-stream
ready" status (SR[0]=0). Each subsequent write after this is a program-data write to the flash array.
Each cell within the memory word to be programmed to 0 receives one WSM pulse; additional
pulses, if required, occur in the verify phase. SR[0]=1 indicates that the WSM is busy applying the
program pulse.
The host programmer must poll the device's Status Register for the "program done" state after each
data-stream write. SR[0]=0 indicates that the appropriate cell(s) within the accessed memory
location have received their single WSM program pulse, and that the device is now ready for the
next word. Although the host may check full status for errors at any time, it is only necessary on a
block basis, after EFP exit.
Addresses must remain within the target block. Supplying an address outside the target block
immediately terminates the program phase; the WSM then enters the EFP verify phase.
The address can either hold constant or it can increment. The device compares the incoming
address to that stored from the setup phase (WA0); if they match, the WSM programs the new data
word at the next sequential memory location. If they differ, the WSM jumps to the new address
location.
The program phase concludes when the host programming system writes to a different block
address, and data supplied must be FFFFh. Upon program phase completion, the device enters the
EFP verify phase.
11.3.4
Verify
A high percentage of the flash bits program on the first WSM pulse. However, for those cells that
do not completely program on their first attempt, EFP internal verification identifies them and
applies additional pulses as required.
The verify phase is identical in flow to the program phase, except that instead of programming
incoming data, the WSM compares the verify-stream data to that which was previously
programmed into the block. If the data compares correctly, the host programmer proceeds to the
next word. If not, the host waits while the WSM applies an additional pulse(s).
The host programmer must reset its initial verify-word address to the same starting location
supplied during the program phase. It then reissues each data word in the same order as during the
program phase. Like programming, the host may write each subsequent data word to WA0 or it may
increment up through the block addresses.
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