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參數(shù)資料
| 型號： | PUMA68FV32006M-90 |
| 元件分類： | PROM |
| 英文描述： | 1M X 32 FLASH 3.3V PROM MODULE, 90 ns, PQMA68 |
| 封裝： | PLASTIC, LCC-68 |
| 文件頁數(shù)： | 4/21頁 |
| 文件大?。?/td> | 174K |
| 代理商： | PUMA68FV32006M-90 |
PUMA 68FV32006/A - 90/12/15
Issue 1.3 : December 1999
12
The device has two control functions which must be satisfied in order to obtain data at the outputs
CS1-4 is the power control and should be used for device selection
OE is the output control and should be used to gate data to the output pins if the device is selected.
Two standby modes are available :
CMOS standby : CS1-4 held at Vcc +/- 0.3V
TTL standby : CS1-4 held at V
IH
In the standby mode the outputs are in a high impedance state independent of the OE input. If the device is
deselected during erasure or programming the device will draw active current until the operation is completed.
With the OE input at a logic high level (V
IH), output from the device is disabled. This will cause the output pins
to be in a high impedance state.
The following description deals with the device operating in 8 bit mode accessed through CS1,
however status flag definitions shown apply equally to the corresponding flag for each device in the module.
Device erasure and programming are accomplished via the command register. The contents of the register
serve as inputs to the internal state machine. The state machine outputs dictate the function of the device. The
register is a latch used to store the commands along with the address and data information required to execute
the command. The command register is written by bringing WE/WE1-4 to V
IL while CS1-4 is at VIL and
OE is at V
IH.Addresses are latched on the falling edge of WE/WE1-4 while data is latched on the rising edge.
The autoselect mode provides manufacturer and device identification, and sector protection verification,
through identifier codes output on DQ7 - DQ0. This mode is primarily intended for programing equipment to
automaticly match a device to be programed with its corresponding programing algorithm. However, the
autoselect codes can also be accessed in-system through the command register.
When using programming equipment, the autoselect mode requires V
ID (11.5V to 12.5V) on address pin A9.
Address pins A6, A1 and A0 must be as shown in the table below. In addition, when verifying sector protection,
the sector address must appear on the appropriate highest order address bits. The table below shows the
remaining address bits have been set as required, the programming equipment may then read the correspond-
ing identifier code on DQ7 - DQ0.
To access the autoselect codes in-system, the host system can issue the autoselect command via the
command register, as shown in command definitions table. This method does not require V
ID.
Description
CE
OE
WE
A19
TO
A13
A12
TO
A10
A9
A8
TO
A7
A6
A5
TO
A2
A1
A0
DQ7
TO
DQ0
Sector Protection Verification
L
LH
SA
X
V
ID
X
LX
H
L
01H
(PROTECTED)
00H
(UNPROTECTED)
L = Logic Low = V
IL, H = Logic High = VIH, SA = Sector Address, X = Don' t care
DEVICE OPERATION
Read Mode
Standby Mode
Output Disable
Autoselect
Write
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PUMA68FV32006X-12 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| PUMA68FV32006X-15 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| PUMA68FV32006X-90 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| PUMA68FV32006XI-12 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| PUMA68FV32006XI-15 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
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