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參數(shù)資料
| 型號： | 24LCS41A |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 1K/4K 2.5V Dual Mode, Dual Port IIC Serial EEPROM(1K/4K位,2.5V雙模式,雙端口IIC串行EEPROM) |
| 中文描述： | 1K/4K 2.5V的雙模式，雙端口串行EEPROM國際進(jìn)口證（1K/4K位，2.5V的雙模式，雙端口串行EEPROM的國際進(jìn)口許可證） |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 104K |
| 代理商： | 24LCS41A |
24LCS41A
DS21175A-page 4
Preliminary
1996 Microchip Technology Inc.
2.0
FUNCTIONAL DESCRIPTION
2.1
DDC Monitor Port
The DDC Monitor Port operates in two modes, the
Transmit-Only Mode and the Bi-directional Mode. There
is a separate 2-wire protocol to support each mode,
each having a separate clock input and sharing a com-
mon data line (DSDA). The device enters the Transmit-
Only Mode upon power-up. In this mode, the device
transmits data bits on the DSDA pin in response to a
clock signal on the VCLK pin. The device will remain in
this mode until a valid high to low transition is placed on
the DSCL input. When a valid transition on DSCL is rec-
ognized, the device will switch into the Bi-directional
Mode and look for its control byte to be sent by the mas-
ter. If it detects its control byte, it will stay in the Bi-direc-
tional Mode. Otherwise, it will revert to the Transmit-
Only Mode after it sees 128 VCLK pulses.
2.1.1
TRANSMIT-ONLY MODE
The device will power up in the Transmit-Only Mode at
address 00H. This mode supports a unidirectional 2-
wire protocol for transmission of the contents of the
memory array. This device requires that it be initialized
prior to valid data being sent in the Transmit-Only Mode
(Section 2.1.2). In this mode, data is transmitted on
the DSDA pin in 8-bit bytes, each followed by a ninth,
null bit (Figure 2-1). The clock source for the Transmit-
Only Mode is provided on the VCLK pin, and a data bit
is output on the rising edge on this pin. The eight bits in
each byte are transmitted by most significant bit first.
Each byte within the memory array will be output in
sequence. When the last byte in the memory array is
transmitted, the output will wrap around to the first loca-
tion and continue. The Bi-directional Mode Clock
(DSCL) pin must be held high for the device to remain
in the Transmit-Only Mode.
2.1.2
INITIALIZATION PROCEDURE
After V
CC
has stabilized, the device will be in the Trans-
mit-Only Mode. Nine clock cycles on the VCLK pin must
be given to the device for it to perform internal sychroni-
zation. During this period, the DSDA pin will be in a high
impedance state. On the rising edge of the tenth clock
cycle, the device will output the first valid data bit which
will be the most significant bit of a byte. The device will
power up at an indeterminate byte address (Figure 2-
2).
FIGURE 2-1:
TRANSMIT-ONLY MODE
FIGURE 2-2:
DEVICE INITIALIZATION
SCL
SDA
VCLK
T
VAA
T
VAA
Bit 1 (LSB)
Null Bit
Bit 1 (MSB)
Bit 7
T
VLOW
T
VHIGH
T
VAA
T
VAA
Bit 8
Bit 7
High Impedance for 9 clock cycles
T
VPU
1
2
8
9
10
11
SCL
SDA
VCLK
V
CC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 24LCS41 | 1K/4K 2.5V Dual Mode, Dual Port IIC Serial EEPROM(1K/4K位,2.5V雙模式,雙端口IIC串行EEPROM) |
| 24LCS52 | Connectors |
| 24LC52-IP | 2K 2.5V I 2 C Serial EEPROM with Software Write Protect |
| 24LC52-ISN | 2K 2.5V I 2 C Serial EEPROM with Software Write Protect |
| 24LC52-IST | 2K 2.5V I 2 C Serial EEPROM with Software Write Protect |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 24LCS52/P | 功能描述:電可擦除可編程只讀存儲器 256x8 - 2.5V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24LCS52/SN | 功能描述:電可擦除可編程只讀存儲器 256x8 - 2.5V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24LCS52/ST | 功能描述:電可擦除可編程只讀存儲器 256x8 - 2.5V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24LCS52-I/MC | 功能描述:電可擦除可編程只讀存儲器 256x8 - 2.5V Industrial Temp RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24LCS52-I/MCG | 功能描述:電可擦除可編程只讀存儲器 256x8 - 2.5V Industrial Temp RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
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