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參數(shù)資料
| 型號： | M41T11MH6E |
| 廠商： | 意法半導體 |
| 英文描述： | Serial Real Time Clock with 56 Bytes of NVRAM |
| 中文描述： | 串行實時時鐘與56字節(jié)的NVRAM |
| 文件頁數(shù)： | 11/29頁 |
| 文件大?。?/td> | 154K |
| 代理商： | M41T11MH6E |
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M41T11
Operation
11/29
Table 2.
AC characteristics
2.2
READ Mode
In this mode, the master reads the M41T11 slave after setting the slave address (see
Figure 8
). Following the write Mode Control Bit (R/W = 0) and the Acknowledge Bit, the word
address A
n
is written to the on-chip address pointer. Next the START condition and slave
address are repeated, followed by the READ Mode Control Bit (R/W = 1). At this point, the
master transmitter becomes the master receiver. The data byte which was addressed will be
transmitted and the master receiver will send an Acknowledge Bit to the slave transmitter.
The address pointer is only incremented on reception of an Acknowledge Bit. The M41T11
slave transmitter will now place the data byte at address A
n
+ 1 on the bus. The master
receiver reads and acknowledges the new byte and the address pointer is incremented to
A
n
+ 2.
This cycle of reading consecutive addresses will continue until the master receiver sends a
STOP condition to the slave transmitter.
An alternate READ mode may also be implemented, whereby the master reads the M41T11
slave without first writing to the (volatile) address pointer. The first address that is read is the
last one stored in the pointer (see
Figure 10 on page 12
).
Symbol
Parameter
(1)
1.
Valid for Ambient Operating Temperature: T
A
= –40 to 85°C; V
CC
= 2.0 to 5.5V (except where noted).
Transmitter must internally provide a hold time to bridge the undefined region (300ns max.) of the falling
edge of SCL.
Min
Max
Unit
f
SCL
SCL clock frequency
0
100
kHz
t
LOW
Clock low period
4.7
μs
t
HIGH
Clock high period
4
μs
t
R
SDA and SCL rise time
1
μs
t
F
SDA and SCL fall time
300
ns
t
HD:STA
START condition hold time
(after this period the first clock pulse is generated)
4
μs
t
SU:STA
START condition setup time
(only relevant for a repeated start condition)
4.7
μs
t
SU:DAT
t
HD:DAT(2)
Data setup time
250
ns
2.
Data hold time
0
μs
t
SU:STO
STOP condition setup time
4.7
μs
t
BUF
Time the bus must be free before a new transmission can start
4.7
μs
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