M41ST85WMX6 STMicroelectronics, M41ST85WMX6 Datasheet - Page 28

• Manufacturer Part Number: M41ST85WMX6
• Description: IC RTC 3.0V NVRAM 28SOIC
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Supervisorr

Specifications of M41ST85WMX6

• Memory Size: 64B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC, 28-SOH (8.48mm Width)
• Function: Clock/Calendar/Supervisor/Alarm
• Rtc Memory Size: 64 Byte
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial (2-Wire, I2C)
• Memory Configuration: 64 X 8
• Nvram Features: RTC, Internal Battery, XTAL
• Interface Type: I2C, Serial, 2-Wire
• Supply Voltage Range: 2.7V To 3.6V
• Memory Case Style: SO
• No. Of Pins: 28
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2805-5

Clock operation
3.13
3.14
28/41
t
Bit D7 of clock register 04h contains the t
continuation of the deselect time after V
time before WRITEs may again be performed to the device after a power-down condition.
The t
Initial power-on defaults
Upon initial application of power to the device, the following register bits are set to a '0' state:
watchdog register, FT, AFE, ABE, SQWE, and TR. The following bits are set to a '1' state:
ST, OUT, and HT (see
Table 6.
1. Default setting
Table 7.
1. WDS, BMB0-BMB4, RB0, RB1.
2. State of other control bits undefined.
3. UC = Unchanged
Initial power-up
Subsequent power-up
(with battery backup)
rec
t
rec
rec
bit
bit (TR)
Condition
bit will allow the user to set the length of this deselect time as defined by
0
0
1
t
Default values
rec
(2)
definitions
(3)
STOP bit (ST)
Table
UC
TR
X
0
1
0
7).
UC
ST
1
HT
CC
1
1
rec
reaches V
Min
bit (TR). t
96
40
50
Out
UC
1
t
rec
FT
0
0
PFD
rec
time
. This allows for a voltage settling
AFE ABE SQWE
refers to the automatic
0
0
200
2000
Max
98
(1)
0
0
0
0
Watchdog
register
M41ST85W
Units
ms
ms
Table
µs
0
0
(1)
6.