- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67987 > MCP79400-I/MS REAL TIME CLOCK, PDSO8 PDF資料下載
參數(shù)資料
| 型號： | MCP79400-I/MS |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | REAL TIME CLOCK, PDSO8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 39/40頁 |
| 文件大?。?/td> | 817K |
| 代理商： | MCP79400-I/MS |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁當(dāng)前第39頁第40頁
MCP7940X
DS25009B-page 8
2011 Microchip Technology Inc.
FIGURE 3-2:
ACKNOWLEDGE TIMING
3.1.2
DEVICE ADDRESSING AND OPERATION
A control byte is the first byte received following the
Start condition from the master device (Figure 3-2).
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 3-3). 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 3-3:
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 |
|---|---|
| MCP79401-I/ST | REAL TIME CLOCK, PDSO8 |
| MCP79400T-I/MS | REAL TIME CLOCK, PDSO8 |
| MCP79402-I/ST | REAL TIME CLOCK, PDSO8 |
| MCP79401-I/SN | REAL TIME CLOCK, PDSO8 |
| MCP79402-I/SN | REAL TIME CLOCK, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP79400T-I | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:I2C Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover |
| MCP79400T-I/MNY | 功能描述:實(shí)時(shí)時(shí)鐘 I2C GP RTCC 64B SRAM ID RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲容量: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 |
| MCP79400T-I/MS | 功能描述:實(shí)時(shí)時(shí)鐘 I2C GP RTCC 64B SRAM ID RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲容量: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 |
| MCP79400T-I/SN | 功能描述:實(shí)時(shí)時(shí)鐘 I2C GP RTCC 64B SRAM ID RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲容量: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 |
| MCP79400T-I/SN-CUT TAPE | 制造商:Microchip 功能描述:MCP79400 Series 5.5 V 64 byte SMT I2C?Real-Time Clock/Calendar - SOIC-8 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。