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参数资料
| 型号： | MCP7940N-I/MS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO8 |
| 封装： | PLASTIC, MSOP-8 |
| 文件页数： | 6/36页 |
| 文件大小： | 551K |
| 代理商： | MCP7940N-I/MS |
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MCP7940N
DS25010A-page 14
2011 Microchip Technology Inc.
5.0
ON BOARD MEMORY
The MCP7940N has battery-backed SRAM. The
SRAM is arranged as 64 x 8 bytes and is retained when
the VCC supply is removed, provided the VBAT supply
is present and enabled.
5.1
SRAM
FIGURE 5-1:
SRAM/RTCC BYTE WRITE
FIGURE 5-2:
SRAM/RTCC MULTIPLE BYTE WRITE
The 64 bytes of user SRAM are at location 0x20h and
can be accessed during an RTCC update. Upon POR
the SRAM will be in an undefined state.
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
S
T
A
R
T
CONTROL
BYTE
ADDRESS
BYTE
DATA
S
T
O
P
A
C
K
A
C
K
A
C
K
S 110 1
0
1 11
P
x
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
S
T
A
R
T
CONTROL
BYTE
ADDRESS
BYTE
DATA BYTE 0
S
T
O
P
A
C
K
A
C
K
A
C
K
DATA BYTE N
A
C
K
S 1 101
0
111
P
x
Note:
Entering an address past 5F for an SRAM
operation will result in the MCP7940N not
acknowledging the address.
相关PDF资料 |
PDF描述 |
|---|---|
| MCP7940NT-I/ST | REAL TIME CLOCK, PDSO8 |
| MCP7940NT-I/SN | REAL TIME CLOCK, PDSO8 |
| MCP7940NT-I/MS | REAL TIME CLOCK, PDSO8 |
| MCP79411-I/SN | REAL TIME CLOCK, PDSO8 |
| MCP79411-I/MNY | REAL TIME CLOCK, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP7940NT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Low-Cost I2C? Real-Time Clock/Calendar with SRAM and Battery Switchover |
| MCP7940NT-E/MNY | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover |
| MCP7940NT-E/MS | 制造商:Microchip Technology Inc 功能描述:I2C GP RTCC, 64B SRAM, EXT - Tape and Reel 制造商:Microchip Technology Inc 功能描述:IC RTCC 64B SRAM GP I2C 8MSOP |
| MCP7940NT-E/SN | 功能描述:实时时钟 I2C GP RTCC 64B SRAM EXT RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| MCP7940NT-E/ST | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover |
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