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M41T93 Datasheet(PDF) 10 Page - STMicroelectronics

Part # M41T93
Description  Serial SPI bus RTC with battery switchover
PDF  49 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T93 Datasheet(HTML) 10 Page - STMicroelectronics

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Summary description
M41T93
10/49
Figure 5.
Hardware hookup
1.
Open drain output
2.
CPOL (Clock Polarity) and CPHA (Clock Phase) are bits that may be set in the SPI Control Register of the MCU.
1.
SDO remains at High Z until eight bits of data are ready to be shifted out during a READ.
Figure 6.
Data and clock timing
AI11822
VCC
Reset Input
(ST6, ST7, ST9, ST10, Others)
SCL
(2)
SPI Interface with
(CPOL, CPHA) =
(0,0) or (1,1)
SDI
SDO
CS
32kHz CLKIN
XO
XI
M41T93
MCU
VSS
VBAT
IRQ/FT/OUT
(1)
RST
(1)
SDI
SQW
SDO
SCL
VCC
INT
E
VCC
Table 2.
Function table
Mode
E
SCL
SDI
SDO
Disable Reset
H
Input Disabled
Input disabled
High Z
WRITE
L
Data bit latch
High Z
READ
L
X
Next data bit shift (1)
AI04630
AI04631
AI04632
C
C
MSB
LSB
CPHA
SDI
0
1
CPOL
0
1
MSB
LSB
SDO



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