參數(shù)資料
型號(hào)： AM29F032B
廠商： Advanced Micro Devices, Inc.
英文描述： 32 Megabit (4 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
中文描述： 32兆位（4個(gè)M × 8位）的CMOS 5.0伏只，統(tǒng)一部門(mén)快閃記憶體
文件頁(yè)數(shù)： 19/39頁(yè)
文件大?。?/td> 937K
代理商： AM29F032B
18
Am29F032B
WRITE OPERATION STATUS
The device provides several bits to determine the sta-
tus of a write operation: DQ2, DQ3, DQ5, DQ6, DQ7,
and RY/BY#. Table 6 and the following subsections de-
scribe the functions of these bits. DQ7, RY/BY#, and
DQ6 each offer a method for determining whether a
program or erase operation is complete or in progress.
These three bits are discussed first.
DQ7: Data# Polling
The Data# Polling bit, DQ7, indicates to the host
system whether an Embedded Algorithm is in
progress or completed, or whether the device is in
Erase Suspend. Data# Polling is valid after the rising
edge of the final WE# pulse in the program or erase
command sequence.
During the Embedded Program algorithm, the device
outputs on DQ7 the complement of the datum pro-
grammed to DQ7. This DQ7 status also applies to pro-
gramming during Erase Suspend. When the
Embedded Program algorithm is complete, the device
outputs the datum programmed to DQ7. The system
must provide the program address to read valid status
information on DQ7. If a program address falls within a
protected sector, Data# Polling on DQ7 is active for ap-
proximately 2
μ
s, then the device returns to reading
array data.
During the Embedded Erase algorithm, Data# Polling
produces a “0” on DQ7. When the Embedded Erase al-
gorithm is complete, or if the device enters the Erase
Suspend mode, Data# Polling produces a “1” on DQ7.
This is analogous to the complement/true datum output
described for the Embedded Program algorithm: the
erase function changes all the bits in a sector to “1”;
prior to this, the device outputs the “complement,” or
“0.” The system must provide an address within any of
the sectors selected for erasure to read valid status in-
formation on DQ7.
After an erase command sequence is written, if all sec-
tors selected for erasing are protected, Data# Polling
on DQ7 is active for approximately 100 μ
s, then the de-
vice returns to reading array data. If not all selected
sectors are protected, the Embedded Erase algorithm
erases the unprotected sectors, and ignores the se-
lected sectors that are protected.
When the system detects DQ7 has changed from the
complement to true data, it can read valid data at
DQ7–DQ0 on the
following
read cycles. This is be-
cause DQ7 may change asynchronously with
DQ0–DQ6 while Output Enable (OE#) is asserted low.
The Data# Polling Timings (During Embedded Algo-
rithms) figure in the “AC Characteristics” section illus-
trates this.
Table 6 shows the outputs for Data# Polling on DQ7.
Figure 4 shows the Data# Polling algorithm.
DQ7 = Data
Yes
No
No
DQ5 = 1
No
Yes
Yes
FAIL
PASS
Read DQ7–DQ0
Addr = VA
Read DQ7–DQ0
Addr = VA
DQ7 = Data
START
Notes:
1. VA = Valid address for programming. During a sector
erase operation, a valid address is an address within
any sector selected for erasure. During chip erase, a
valid address is any non-protected sector address.
2.
DQ7 should be rechecked even if DQ5 = “1” because
DQ7 may change simultaneously with DQ5.
Figure 4.
Data# Polling Algorithm
相關(guān)PDF資料
PDF描述
AM29F032B-120 32 Megabit (4 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F032B-120EC 32 Megabit (4 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F032B-120EE 32 Megabit (4 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F032B-120EI 32 Megabit (4 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F032B-120FC 32 Megabit (4 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM29F032B-120ED 制造商:Spansion 功能描述:
AM29F032B75ED 制造商:Advanced Micro Devices 功能描述:
AM29F032B-75EF 制造商:Spansion 功能描述: 制造商:Spansion 功能描述:32M (4M X 8-BIT) 5V FLSH SCTR 制造商:Spansion 功能描述:IC, FLASH MEM, 32MBIT, 75NS, 40-TSOP, Memory Type:Flash - NOR, Memory Size:32Mbi
AM29F032B-75EF\\T 制造商:Spansion 功能描述:32M (4MX8) 5V, UNIFORM SECTOR, TSOP40, IND, HAZMAT TR - Tape and Reel
AM29F032B-75EF\T 制造商:Spansion 功能描述:32M (4MX8) 5V, UNIFORM SECTOR, TSOP40, IND, HAZMAT TR - Tape and Reel
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