參數(shù)資料
型號(hào)： MCP79400T-I/SN
廠(chǎng)商： Microchip Technology
文件頁(yè)數(shù)： 15/15頁(yè)
文件大?。?/td> 0K
描述： IC RTCC 64B SRAM GP I2C 8SOIC
標(biāo)準(zhǔn)包裝： 3,300
類(lèi)型： 時(shí)鐘/日歷
特點(diǎn)： 警報(bào)器，閏年，方波輸出，SRAM，唯一 ID
存儲(chǔ)容量： 64B
時(shí)間格式： HH:MM:SS（12/24 小時(shí)）
數(shù)據(jù)格式： YY-MM-DD-dd
接口： I²C，2 線(xiàn)串口
電源電壓： 1.8 V ~ 5.5 V
電壓 - 電源，電池： 1.3 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 8-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 8-SOICN
包裝： 帶卷 (TR)
2011 Microchip Technology Inc.
DS25009C-page 9
MCP7940X
FIGURE 4-2:
ACKNOWLEDGE TIMING
4.1.2
DEVICE ADDRESSING AND OPERATION
A control byte is the first byte received following the
Start condition from the master device (Figure 4-2).
The control byte consists of a control code; for the
MCP7940X this is set as ‘1010111’ for read and write
operations for the Unique ID after the correct unlock
sequence.
The control byte for accessing the SRAM and RTCC
registers are set to ‘1101111’. The RTCC registers and
the SRAM share the same address space.
The last bit of the control byte defines the operation to
be performed. When set to a ‘1’ a read operation is
selected, and when set to a ‘0’ a write operation is
selected. The next byte received defines the address of
the data byte (Figure 4-3). The upper address bits are
transferred first, followed by the Least Significant bits
(LSb).
Following the Start condition, the MCP7940X monitors
the SDA bus, checking the device type identifier being
transmitted.
Upon
receiving
an
‘1010111’ or
‘1101111’ code, the slave device outputs an
Acknowledge signal on the SDA line. Depending on the
state of the R/W bit, the MCP7940X will select a read
or write operation.
FIGURE 4-3:
ADDRESS SEQUENCE BIT ASSIGNMENTS
SCL
9
8
7
6
5
4
3
2
11
2
3
Transmitter must release the SDA line at this point
allowing the Receiver to pull the SDA line low to
acknowledge the previous eight bits of data.
Receiver must release the SDA line at this point
so the Transmitter can continue sending data.
Data from transmitter
SDA
Acknowledge
Bit
1
010
R/W
1
A
0
11
1
0
A
Unique ID CONTROL BYTE
ADDRESS BYTE
CONTROL
CODE
111
X = Don’t Care
1
101
R/W
X
A
0
SRAM RTCC CONTROL BYTE
ADDRESS BYTE
CONTROL
CODE
111
X = Don’t Care
21
相關(guān)PDF資料
PDF描述
MS27505E19B66P CONN RCPT 66POS BOX MNT W/PINS
VI-JTZ-MZ CONVERTER MOD DC/DC 2V 10W
MCP4142-503E/P IC DGTL SNGL 50K SPI 8DIP
VI-JTY-MZ CONVERTER MOD DC/DC 3.3V 16.5W
MS3121E12-3S CONN RCPT 3POS CBL MNT W/SCKT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP79401 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:I2C? Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover
MCP79401-I/MS 功能描述:實(shí)時(shí)時(shí)鐘 I2C GP RTCC 64B SRAM EUI-48 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
MCP79401-I/SN 功能描述:實(shí)時(shí)時(shí)鐘 I2C GP RTCC 64B SRAM EUI-48 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
MCP79401-I/ST 功能描述:實(shí)時(shí)時(shí)鐘 I2C GP RTCC 64B SRAM EUI-48 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
MCP79401T-I/MNY 功能描述:實(shí)時(shí)時(shí)鐘 I2C GP RTCC 64B SRAM EUI-48 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*