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| 型號： | MCP7940N-I/SN |
| 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： | 3.90 MM, ROHS COMPLIANT, PLASTIC, SOIC-8 |
| 文件頁數(shù)： | 8/36頁 |
| 文件大?。?/td> | 551K |
| 代理商： | MCP7940N-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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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MCP7940NT | 制造商:MICROCHIP 制造商全稱: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 制造商全稱: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:實(shí)時(shí)時(shí)鐘 I2C GP RTCC 64B SRAM EXT 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 |
| MCP7940NT-E/ST | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover |
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