STEVAL-SCM001V1 STMicroelectronics, STEVAL-SCM001V1 Datasheet - Page 6

• Manufacturer Part Number: STEVAL-SCM001V1
• Description: KIT DEMO DONGLE RTC M41T62/ST7
• Manufacturer: STMicroelectronics

Specifications of STEVAL-SCM001V1

• Design Resources: STEVAL-SCM001V1 Gerber Files STEVAL-SCM001V1/RTC Schematic
• Main Purpose: Timing, ARM7 based RTC USB Dongle
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: M41T62, ST72F651
• Primary Attributes: RTC (Real-Time Clock) and Mass Storage Capabilities
• Secondary Attributes: Graphical User Interface, USB Interface
• Silicon Manufacturer: ST Micro
• Silicon Core Number: M41T62 And ST72651AR6
• Kit Application Type: Clock & Timing
• Application Sub Type: RTC Dongle
• Kit Contents: Board CD Docs
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5684

Description
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Description
The M41T6x serial access TIMEKEEPER
32.768 kHz oscillator. Eight registers are used for the clock/calendar function and are
configured in binary coded decimal (BCD) format. An additional 8 registers provide
status/control of alarm, 32 KHz output, calibration, and watchdog functions. Addresses and
data are transferred serially via a two line, bi-directional I
register is incremented automatically after each WRITE or READ data byte.
Functions available to the user include a time-of-day clock/calendar, alarm interrupts
(M41T62/65), 32 KHz output (M41T62/63/64), programmable square wave output
(M41T62/63/64), and watchdog output (M41T63/65). The eight clock address locations
contain the century, year, month, date, day, hour, minute, second and tenths/hundredths of a
second in 24 hour BCD format. Corrections for 28-, 29- (leap year), 30- and 31-day months
are made automatically.
The M41T6x is supplied in two very small packages: a tiny, 3 mm x 3 mm 16-pin QFN which
requires a user-supplied 32 KHz crystal, and an ultra-small 1.5 mm x 3.2 mm LCC with
embedded crystal - no external crystal is required.
Figure 1.
1. Open drain.
2. Defaults to 32 KHz on power-up.
3. Not bonded on LCC package.
M41T62 logic diagram
Doc ID 10397 Rev 15
XO
SDA
SCL
XI
(3)
(3)
®
M41T62
is a low power serial RTC with a built-in
V
V
SS
CC
2
C interface. The built-in address
SQW
IRQ/OUT
(2)
(1)
M41T62/63/64/65
AI09103