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參數(shù)資料
| 型號： | M50FLW040A_06 |
| 廠商： | 意法半導體 |
| 英文描述： | 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory |
| 中文描述： | 4兆位（5】64字節(jié)塊3】16】4 Kbyte的）3 - V電源供電固件集線器/低引腳數(shù)的閃存 |
| 文件頁數(shù)： | 13/64頁 |
| 文件大小： | 338K |
| 代理商： | M50FLW040A_06 |
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M50FLW040A, M50FLW040B
Signal descriptions
13/64
2
Signal descriptions
There are two distinct bus interfaces available on this device. The active interface is selected
before power-up, or during Reset, using the Interface Configuration Pin, IC.
The signals for each interface are discussed in the
Firmware Hub/low-pin count (FWH/LPC)
signal descriptions
section and the
Address/Address Multiplexed (A/A Mux) signal
descriptions
section, respectively, while the supply signals are discussed in the
Supply
signal descriptions
section.
2.1
Firmware Hub/low-pin count (FWH/LPC) signal descriptions
Please see
Figure 1
and
Table 1
.
2.1.1
Input/Output communications (FWH0/LAD0-FWH3/LAD3)
All Input and Output Communications with the memory take place on these pins. Addresses
and Data for Bus Read and Bus Write operations are encoded on these pins.
2.1.2
Input communication frame (FWH4/LFRAME)
The Input Communication Frame (FWH4/LFRAME) signal indicates the start of a bus
operation. When Input Communication Frame is Low, V
IL
, on the rising edge of the Clock, a
new bus operation is initiated. If Input Communication Frame is Low, V
IL
, during a bus
operation then the operation is aborted. When Input Communication Frame is High, V
IH
, the
current bus operation is either proceeding or the bus is idle.
2.1.3
Identification inputs (ID0-ID3)
Up to 16 memories can be addressed on a bus, in the Firmware Hub (FWH) mode. The
Identification Inputs allow each device to be given a unique 4-bit address. A ‘0’ is signified
on a pin by driving it Low, V
IL
, or leaving it floating (since there is an internal pull-down
resistor, with a value of R
IL
). A ‘1’ is signified on a pin by driving it High, V
IH
(and there will
be a leakage current of I
LI2
through the pin).
By convention, the boot memory must have address ‘0000’, and all additional memories are
given addresses, allocated sequentially, from ‘0001’.
In the Low Pin Count (LPC) mode, the identification Inputs (ID0-ID2) can address up to 8
memories on a bus. In the LPC mode, the ID3 pin is Reserved for Future Use (RFU). The
value on address A19-A21 is compared to the hardware strapping on the ID0-ID2 pins to
select the memory that is being addressed. For an address bit to be ‘1’, the corresponding
ID pin can be left floating or driven Low, V
IL
(again, with the internal pull-down resistor, with
a value of R
IL
). For an address bit to be ‘0’, the corresponding ID pin must be driven High,
V
IH
(and there will be a leakage current of I
LI2
through the pin, as specified in
Table 24
). For
details, see
Table 5
.
相關PDF資料 |
PDF描述 |
|---|---|
| M50FLW040AK5G | 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory |
| M50FLW040AK5P | 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory |
| M50FLW040AK5TG | 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory |
| M50FLW040AK5TP | 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory |
| M50FLW040AN5G | 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M50FLW040AK1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit (5 x 64KByte Blocks + 3 x 16 x 4KByte Sectors) 3V Supply Firmware Hub / Low Pin Count Flash Memory |
| M50FLW040AK1G | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit (5 x 64KByte Blocks + 3 x 16 x 4KByte Sectors) 3V Supply Firmware Hub / Low Pin Count Flash Memory |
| M50FLW040AK1P | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit (5 x 64KByte Blocks + 3 x 16 x 4KByte Sectors) 3V Supply Firmware Hub / Low Pin Count Flash Memory |
| M50FLW040AK1T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit (5 x 64KByte Blocks + 3 x 16 x 4KByte Sectors) 3V Supply Firmware Hub / Low Pin Count Flash Memory |
| M50FLW040AK1TG | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit (5 x 64KByte Blocks + 3 x 16 x 4KByte Sectors) 3V Supply Firmware Hub / Low Pin Count Flash Memory |
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