m41t93 STMicroelectronics, m41t93 Datasheet - Page 10

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m41t93

Manufacturer Part Number
m41t93
Description
Serial Spi Bus Rtc With Battery Switchover
Manufacturer
STMicroelectronics
Datasheet

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Figure 5.
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.
Table 2.
1. SDO remains at High Z until eight bits of data are ready to be shifted out during a READ.
Figure 6.
10/51
Disable Reset
CPOL
WRITE
READ
Mode
0
1
V CC
Hardware hookup
Function table
Data and clock timing
CPHA
0
1
SDO
C
C
SDI
V CC
XI
XO
V BAT
V SS
IRQ/FT/OUT
M41T93
E
H
L
L
RST
SQW
SDO
SCL
SDI
(1)
(1)
MSB
MSB
E
Input Disabled
AI04630
AI04631
SCL
Input disabled
Data bit latch
V CC
INT
Reset Input
SCL
SDI
SDO
CS
32kHz CLKIN
(ST6, ST7, ST9, ST10, Others)
SDI
X
(2)
(CPOL, CPHA) =
(0,0) or (1,1)
SPI Interface with
MCU
Next data bit shift
LSB
LSB
AI11822
High Z
High Z
SDO
AI04632
(1)

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