M41T256YMT7 STMicroelectronics, M41T256YMT7 Datasheet - Page 18
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M41T256YMT7
Manufacturer Part Number
M41T256YMT7
Description
Real Time Clock Serial 256K (32Kx8)
Manufacturer
STMicroelectronics
Datasheet
1.M41T256YMT7.pdf
(30 pages)
Specifications of M41T256YMT7
Function
Clock, Calendar
Rtc Memory Size
32768 B
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.5 V
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
- 25 C
Mounting Style
SMD/SMT
Rtc Bus Interface
Serial
Package / Case
SO-44
Time Format
HH:MM:SS:hh
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
M41T256YMT7F
Manufacturer:
STMicroelectronics
Quantity:
135
Note:
3.4
18/30
Table 3.
Keys:
7FF0h through 7FF6h are invalid addresses and when read will return arbitrary data.
Power-on reset
The M41T256Y continuously monitors V
point, the RST pulls low (open drain) and remains low on power-up for t
passes V
should be chosen to control rise time.
Address
7FFDh
7FFCh
7FFFh
7FFEh
7FFBh
7FFAh
7FF9h
7FF8h
7FF7h
7FF6h
7FF5h
7FF4h
7FF3h
7FF2h
7FF1h
7FF0h
S = Sign bit
FT = Frequency test bit
ST = Stop bit
WC = Write clock bit
X = '1' or '0'
BL = Battery low flag (read only bit)
TB = Tamper bit (read only bit)
TEB = Tamper enable bit
0 = Must be set to '0'
SLP = Sleep mode bit
PFD
WC
TIMEKEEPER
D7
BL
ST
X
X
X
X
X
X
X
(max). The RST pin is an open drain output and an appropriate pull-up resistor
0
0
0
0
0.1 Seconds
SLP
D6
FT
X
X
X
X
X
X
X
0
0
0
10 years
10 seconds
10 minutes
TEB
D5
0
S
X
X
X
X
X
X
X
10 hours
®
10 date
register map
10M
D4
TB
X
X
X
X
X
X
X
Data
CC
D3
X
X
X
X
X
X
X
0
Hours (24 Hour Format)
. When V
Date: Day of Month
Calibration
0.01 Seconds
D2
X
X
X
X
X
X
X
Seconds
Minutes
Month
Day of Week
Year
CC
D1
X
X
X
X
X
X
X
falls to the power fail detect trip
D0
X
X
X
X
X
X
X
Tamper/day
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Seconds
Seconds
Minutes
Control
Month
Hours
Date
Year
Function/Range
REC
BCD Format
after V
0-1/01-07
CC
01-31
00-59
00-59
00-99
00-99
01-12
00-23