參數(shù)資料
型號(hào)： M95020-WMN3G/W
廠商： STMICROELECTRONICS
元件分類： PROM
英文描述： 256 X 8 SPI BUS SERIAL EEPROM, PDSO8
封裝： 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8
文件頁(yè)數(shù)： 3/42頁(yè)
文件大?。?/td> 250K
代理商： M95020-WMN3G/W
M95040, M95020, M95010
Connecting to the SPI bus
3
Connecting to the SPI bus
These devices are fully compatible with the SPI protocol.
All instructions, addresses and input data bytes are shifted in to the device, most significant
bit first. The Serial Data Input (D) is sampled on the first rising edge of the Serial Clock (C)
after Chip Select (S) goes Low.
All output data bytes are shifted out of the device, most significant bit first. The Serial Data
Output (Q) is latched on the first falling edge of the Serial Clock (C) after the instruction
(such as the Read from Memory Array and Read Status Register instructions) have been
clocked into the device.
Figure 3 shows three devices, connected to an MCU, on a SPI bus. Only one device is
selected at a time, so only one device drives the Serial Data Output (Q) line at a time, all the
others being high impedance.
Figure 3.
Bus master and memory devices on the SPI bus
1.
The Write Protect (W) and Hold (HOLD) signals should be driven, High or Low as appropriate.
2.
These pull-up resistors, R, ensure that the M950x0 are not selected if the Bus Master leaves the S line in the high-
impedance state. As the Bus Master may enter a state where all inputs/outputs are in high impedance at the same time
(that is when the Bus Master is reset), the clock line (C) must be connected to an external pull-down resistor so that, when
all inputs/outputs become high impedance, S is pulled High while C is pulled Low (thus ensuring that S and C do not
become High at the same time, and so, that the tSHCH requirement is met).
AI12304
Bus Master
SPI Memory
Device
SDO
SDI
SCK
CQD
S
SPI Memory
Device
CQD
S
SPI Memory
Device
CQD
S
CS3
CS2 CS1
SPI Interface with
(CPOL, CPHA) =
(0, 0) or (1, 1)
W
HOLD
W
HOLD
W
HOLD
R(2)
VCC
VSS
R(2)
相關(guān)PDF資料
PDF描述
M95256-RDW3/A 32K X 8 SPI BUS SERIAL EEPROM, PDSO8
M95256-RMN6P/A 32K X 8 SPI BUS SERIAL EEPROM, PDSO8
M95256-WDW3T/A 32K X 8 SPI BUS SERIAL EEPROM, PDSO8
M95256-RDW6TG 32K X 8 SPI BUS SERIAL EEPROM, PDSO8
MA-306-29.4912M-K0 QUARTZ CRYSTAL RESONATOR, 29.4912 MHz
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M95020-WMN3P 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4Kbit, 2Kbit and 1Kbit Serial SPI Bus EEPROM With High Speed Clock
M95020-WMN3P/W 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4Kbit, 2Kbit and 1Kbit Serial SPI Bus EEPROM With High Speed Clock
M95020-WMN3T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4Kbit, 2Kbit and 1Kbit Serial SPI Bus EEPROM With High Speed Clock
M95020-WMN3T/W 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4Kbit, 2Kbit and 1Kbit Serial SPI Bus EEPROM With High Speed Clock
M95020-WMN3TG 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4Kbit, 2Kbit and 1Kbit Serial SPI Bus EEPROM With High Speed Clock
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