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| 型号： | MCP7940NT-I/SN |
| 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： | 3.90 MM, ROHS COMPLIANT, PLASTIC, SOIC-8 |
| 文件页数： | 8/36页 |
| 文件大小： | 551K |
| 代理商： | MCP7940NT-I/SN |
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MCP7940N
DS25010A-page 16
2011 Microchip Technology Inc.
5.2.2.3
Sequential Read
Sequential reads are initiated in the same way as a
random read except that after the MCP7940N
transmits the first data byte, the master issues an
Acknowledge as opposed to the Stop condition used in
a
random
read.
This
Acknowledge
directs
the
MCP7940N
to
transmit
the
next
sequentially
addressed 8-bit word (Figure 5-6). Following the final
byte transmitted to the master, the master will NOT
generate an Acknowledge but will generate a Stop
condition. To provide sequential reads, the MCP7940N
contains
an
internal
Address
Pointer
which
is
incremented by one at the completion of each
operation. This Address Pointer allows the entire
memory contents to be serially read during one
operation. The internal Address Pointer will automat-
ically roll over to the start of the Block.
FIGURE 5-5:
RANDOM READ
FIGURE 5-6:
SEQUENTIAL READ
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
A
C
K
N
O
A
C
K
A
C
K
A
C
K
S
T
O
P
S
T
A
R
T
CONTROL
BYTE
ADDRESS
BYTE
CONTROL
BYTE
DATA
BYTE
S
T
A
R
T
S 1 101
0
111
S 10 10
1
P
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
CONTROL
BYTE
DATA n
DATA n + 1
DATA n + 2
DATA n + X
N
O
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
S
T
O
P
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PDF描述 |
|---|---|
| MCP7940NT-I/MS | REAL TIME CLOCK, PDSO8 |
| MCP79411-I/SN | REAL TIME CLOCK, PDSO8 |
| MCP79411-I/MNY | REAL TIME CLOCK, PDSO8 |
| MCP79410-I/ST | REAL TIME CLOCK, PDSO8 |
| MCP79411-I/MS | REAL TIME CLOCK, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP79410 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:I2C? Real-Time Clock/Calendar with EEPROM, SRAM, Unique ID and Battery Switchover |
| MCP79410_13 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Battery-Backed I2Ca?￠ Real-Time Clock/Calendar with EEPROM and Unique ID |
| MCP79410-I/MNY | 制造商:Microchip Technology Inc 功能描述:I2C GP RTCC, 1KB EE, 64B SRAM, ID - Rail/Tube |
| MCP79410-I/MS | 功能描述:实时时钟 I2C GP RTCC 1Kb EE 64B SRAM ID 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 |
| MCP79410-I/P | 制造商:Microchip Technology Inc 功能描述:I2C GP RTCC, 1KB EE, 64B SRAM, ID - Rail/Tube 制造商:Microchip Technology Inc 功能描述:RTCC 12C 1K EE 64B SRAM 8PDIP |
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