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參數資料
| 型號： | X25020VI-2.7 |
| 英文描述： | SPI Serial EEPROM |
| 中文描述： | SPI串行EEPROM |
| 文件頁數： | 2/13頁 |
| 文件大?。?/td> | 128K |
| 代理商： | X25020VI-2.7 |
X25020
Characteristics subject to change without notice.
2 of 13
REV 1.1 7/12/00
www.xicor.com
sequence is underway, HOLD may be used to pause
the serial communication with the controller without
resetting the serial sequence. To pause, HOLD must
be brought LOW while SCK is LOW. To resume com-
munication, HOLD is brought HIGH, again while SCK
is LOW. If the pause feature is not used, HOLD should
be held HIGH at all times.
PIN DESCRIPTIONS
Serial Output (SO)
SO is a push/pull serial data output pin. During a read
cycle, data is shifted out on this pin. Data is clocked out
by the falling edge of the serial clock.
Serial Input (SI)
SI is the serial data input pin. All opcodes, byte
addresses, and data to be written to the memory are
input on this pin. Data is latched by the rising edge of
the serial clock.
Serial Clock (SCK)
The Serial Clock controls the serial bus timing for data
input and output. Opcodes, addresses, or data present
on the SI pin are latched on the rising edge of the clock
input, while data on the SO pin change after the falling
edge of the clock input.
Chip Select (CS)
When CS is HIGH, the X25020 is deselected and the
SO pin is at high impedance; unless an internal write
operation is underway, the X25020 will be in the
standby power mode. CS LOW enables the X25020,
placing it in the active power mode. It should be noted
that after power-up, a HIGH to LOW transition on CS is
required prior to the start of any operation.
Write Protect (WP)
When WP is LOW, nonvolatile writes to the X25020 are
disabled, but the part otherwise functions normally.
When WP is held HIGH, all functions, including nonvol-
atile writes operate normally. WP going LOW while CS
is still LOW will interrupt a write to the X25020. If the
internal write cycle has already been initiated, WP
going LOW will have no affect on a write.
Hold (HOLD)
HOLD is used in conjunction with the CS pin to select
the device. Once the part is selected and a serial
PIN CONFIGURATION
PIN NAMES
PRINCIPLES OF OPERATION
The X25020 is a 256 x 8 EEPROM designed to interface
directly with the synchronous serial peripheral interface
(SPI) of many popular microcontroller families.
The X25020 contains an 8-bit instruction register. It is
accessed via the SI input, with data being clocked in on
the rising SCK. CS must be LOW and the HOLD and
WP inputs must be HIGH during the entire operation.
Table 1 contains a list of the instructions and their
opcodes. All instructions, addresses and data are
transferred MSB first.
Data input is sampled on the first rising edge of SCK
after CS goes LOW. SCK is static, allowing the user to
stop the clock and then resume operations. If the clock
line is shared with other peripheral devices on the SPI
bus, the user can assert the HOLD input to place the
X25020 into a “PAUSE” condition. After releasing
HOLD, the X25020 will resume operation from the
point when HOLD was first asserted.
Symbol
CS
SO
SI
SCK
WP
V
SS
V
CC
HOLD
Description
Chip Select Input
Serial Output
Serial Input
Serial Clock Input
Write Protect Input
Ground
Supply Voltage
Hold Input
SOIC
CS
SO
WP
V
SS
V
CC
HOLD
SCK
SI
X25020
1
2
3
4
8
7
6
5
相關PDF資料 |
PDF描述 |
|---|---|
| X25020VI-3 | 20V Single N-Channel HEXFET Power MOSFET in a I-Pak package; A IRFU3711ZCPBF with Standard Packaging |
| X25020 | SPI Serial E2PROM with Block LockTM Protection |
| X25020P | Solid State Relay; Output Device:SCR; Output Voltage Max:660Vrms; Output Voltage Min:48Vrms; Control Voltage Max:10VAC; Control Voltage Min:140VAC; Load Current Max:90A; Switching:Zero Cross; Relay Options:Indicator Light RoHS Compliant: Yes |
| X25020P-2.7 | Solid State Relay; Output Device:SCR; Output Voltage Max:280Vrms; Output Voltage Min:24Vrms; Control Voltage Max:3VDC; Control Voltage Min:32VDC; Load Current Max:110A; Switching:Zero Cross; Relay Options:Indicator Light RoHS Compliant: Yes |
| X25020P-3 | Solid State Relay; Output Device:SCR; Output Voltage Max:280Vrms; Output Voltage Min:24Vrms; Control Voltage Max:3VDC; Control Voltage Min:32VDC; Load Current Max:125A; Switching:Zero Cross; Relay Options:Indicator Light RoHS Compliant: Yes |
相關代理商/技術參數 |
參數描述 |
|---|---|
| X25020VI-3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SPI Serial EEPROM |
| X25021 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:SPI Serial E2PROM with Block LockTM Protection |
| X25021P | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:SPI Serial E2PROM with Block LockTM Protection |
| X25021P-2.7 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:SPI Serial E2PROM with Block LockTM Protection |
| X25021P-3 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:SPI Serial E2PROM with Block LockTM Protection |
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