參數(shù)資料
型號(hào)： MCP7940NT-I/MS
元件分類(lèi)： 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： PLASTIC, MSOP-8
文件頁(yè)數(shù)： 8/36頁(yè)
文件大?。?/td> 551K
代理商： MCP7940NT-I/MS
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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MCP79411-I/SN REAL TIME CLOCK, PDSO8
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參數(shù)描述
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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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