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M41T94 Datasheet(PDF) 6 Page - STMicroelectronics

Part No. M41T94
Description  512 Bit 64 bit x8 SERIAL RTC SPI SRAM
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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M41T94 Datasheet(HTML) 6 Page - STMicroelectronics

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M41T94
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Figure 6. Block Diagram
Note: 1. Open drain output
Figure 7. Hardware Hookup
Note: 1. CPOL (Clock Polarity) and CPHA (Clock Phase) are bits that may be set in the SPI Control Register of the MCU.
AI04785
COMPARE
VPFD = 4.4V
VCC
COMPARE
VSO = 2.5V
VBL= 2.5V
BL
COMPARE
Crystal
SPI
INTERFACE
REAL TIME CLOCK
CALENDAR
44 BYTES
USER RAM
RTC w/ALARM
& CALIBRATION
WATCHDOG
SQUARE WAVE
SDO
E
SDI
SCL
RSTIN1
POR
SQW
RST
(1)
WDI
WDF
AF
IRQ/FT/OUT
(1)
VBAT
32KHz
OSCILLATOR
RSTIN2
(2.65V if THS = V
SS
)
AI03686
Master
(ST6, ST7, ST9,
ST10, Others)
SPI Interface with
(CPOL, CPHA)(1) =
('0','0') or ('1','1')
D
Q
C
CS3
CS2
CS1
M41T94
E
XXXXX
CQD
XXXXX
CQD
E
E
CQD


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