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| 型号： | PC28F256J3C-115 |
| 厂商： | Intel Corp. |
| 英文描述： | Intel StrataFlash Memory (J3) |
| 中文描述： | 英特尔StrataFlash存储器（J3） |
| 文件页数： | 39/72页 |
| 文件大小： | 905K |
| 代理商： | PC28F256J3C-115 |
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256-Mbit J3 (x8/x16)
Datasheet
39
10.2
Read Identifier Codes
The Read identifier codes operation outputs the manufacturer code, device-code, and the block
lock configuration codes for each block (See
Section 9.2, “Device Commands” on page 35
for
details on issuing the Read Device Identifier command). Page-mode reads are not supported in this
read mode. To terminate the operation, write another valid command. Like the Read Array
command, the Read Identifier Codes command functions independently of the V
PEN
voltage. This
command is valid only when the WSM is off or the device is suspended. Following the Read
Identifier Codes command, the following information can be read.
10.2.1
Read Status Register
The Status Register may be read to determine when a block erase, program, or lock-bit
configuration is complete and whether the operation completed successfully. It may be read only
after the specified time W12 (see
Table 9, “Write Operations” on page 26
). After writing this
command, all subsequent read operations output data from the Status Register until another valid
command is written. Page-mode reads are not supported in this read mode. The Status Register
contents are latched on the falling edge of OE# or the first edge of CE0, CE1, or CE2 that enables
the device (see
Table 13, “Chip Enable Truth Table” on page 33
). OE# must toggle to V
IH
or the
device must be disabled before further reads to update the Status Register latch. The Read Status
Register command functions independently of the V
PEN
voltage.
During a program, block erase, set lock-bit, or clear lock-bit command sequence, only SR.7 is valid
until the Write State Machine completes or suspends the operation. Device I/O signals D[6:0] and
D[15:8] are placed in a high-impedance state. When the operation completes or suspends (check
SR.7), all contents of the Status Register are valid when read.
Table 17. Read Identifier Codes
Code
Address
(1)
Data
Manufacture Code
00000
(00) 89
Device Code
32-Mbit
00001
(00) 16
64-Mbit
00001
(00) 17
128-Mbit
00001
(00) 18
256-Mbit
00001
(00) 1D
Block Lock Configuration
X
0002
(2)
Block Is Unlocked
D0 = 0
Block Is Locked
D0 = 1
Reserved for Future Use
D[7:1]
NOTES:
1. A0 is not used in either x8 or x16 modes when obtaining the identifier
codes. The lowest order address line is A1. Data is always presented
on the low byte in x16 mode (upper byte contains 00h).
2. X selects the specific block’s lock configuration code.
3. D[7:1] are invalid and should be ignored.
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