- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄366389 > AM28F256-150PI (ADVANCED MICRO DEVICES INC) 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory PDF資料下載
參數(shù)資料
| 型號(hào)： | AM28F256-150PI |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | PROM |
| 英文描述： | 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| 中文描述： | 32K X 8 FLASH 12V PROM, 150 ns, PDIP32 |
| 封裝： | PLASTIC, DIP-32 |
| 文件頁數(shù)： | 10/35頁 |
| 文件大?。?/td> | 493K |
| 代理商： | AM28F256-150PI |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁當(dāng)前第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁
10
Am28F256
ERASE, PROGRAM, AND READ MODE
When V
PP
is equal to 12.0 V ± 5%, the command reg-
ister is active. All functions are available. That is, the
device can program, erase, read array or autoselect
data, or be standby mode.
Write Operations
High voltage must be applied to the V
PP
pin in order to
activate the command register. Data written to the reg-
ister serves as input to the internal state machine. The
output of the state machine determines the operational
function of the device.
The command register does not occupy an addressable
memory location. The register is a latch that stores the
command, along with the address and data information
needed to execute the command. The register is written
by bringing WE# and CE# to V
IL
, while OE# is at V
IH
.
Addresses are latched on the falling edge of WE#, while
data is latched on the rising edge of the WE# pulse.
Standard microprocessor write timings are used.
The device requires the OE# pin to be V
IH
for write op-
erations. This condition eliminates the possibility for
bus contention during programming operations. In
order to write, OE# must be V
IH
, and CE# and WE#
must be V
IL
. If any pin is not in the correct state a write
command will not be executed.
Refer to AC Write Characteristics and the Erase/Pro-
gramming Waveforms for specific timing parameters.
Command Definitions
The contents of the command register default to 00h
(Read Mode) in the absence of high voltage applied to
the V
PP
pin. The device operates as a read only mem-
ory. High voltage on the V
PP
pin enables the command
register. Device operations are selected by writing spe-
cific data codes into the command register. Table 3 de-
fines these register commands.
Read Command
Memory contents can be accessed via the read com-
mand when V
PP
is high. To read from the device, write
00h into the command register. Standard microproces-
sor read cycles access data from the memory. The de-
vice will remain in the read mode until the command
register contents are altered.
The command register defaults to 00h (read mode)
upon V
PP
power-up. The 00h (Read Mode) register de-
fault helps ensure that inadvertent alteration of the
memory contents does not occur during the V
PP
power
transition. Refer to the AC Read Characteristics and
Waveforms for the specific timing parameters.
Table 3.
Am28F256 Command Definitions
Notes:
1. Bus operations are defined in Table 1.
2. RA = Address of the memory location to be read.
EA = Address of the memory location to be read during erase-verify
PA = Address of the memory location to be programmed.
X = Don’t care.
Addresses are latched on the falling edge of the WE# pulse.
3. RD = Data read from location RA during read operation.
EVD = Data read from location EA during erase-verify
PD = Data to be programmed at location PA. Data latched on the rising edge of WE#.
PVD = Data read from location PA during program-verify. PA is latched on the Program command.
4. Refer to the appropriate section for algorithms and timing diagrams.
Command (Note 4)
First Bus Cycle
Second Bus Cycle
Operation
(Note 1)
Address
(Note 2)
Data
(Note 3)
Operation
(Note 1)
Address
(Note 2)
Data
(Note 3)
Read Memory
Write
X
00h/FFh
Read
RA
RD
Read Auto select
Write
X
80h or 90h
Read
00h/01h
01h/A1h
Erase Set-up/Erase Write
Write
X
20h
Write
X
20h
Erase-Verify
Write
EA
A0h
Read
X
EVD
Program Setup/Program
Write
X
40h
Write
PA
PD
Program-Verify
Write
X
C0h
Read
X
PVD
Reset
Write
X
FFh
Write
X
FFh
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM28F256-150PIB | Voltage-controlled oscillator 14-PDIP 0 to 70 |
| AM28F256-200EC | 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-200ECB | 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-200EE | 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-200EEB | 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM28F256-150PIB | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-200C3/BUA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 Flash EEPROM |
| AM28F256-200C3/BXA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 Flash EEPROM |
| AM28F256-200C3JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 Flash EEPROM |
| AM28F256-200C3JI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 Flash EEPROM |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。