M41T93SQA6E View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M41T93SQA6E

Serial SPI bus RTC with battery switchover

STMicroelectronics 

M41T93

Figure 11. Clock accuracy vs. on-chip load capacitors

Clock operation

100.0

80.0

60.0

XI

XO

Crystal

Oscillator

CXI

CXO

40.0

20.0

FASTER

0.0

SLOWER

-20.0

OFFSET TO

CXI, CXO (pF)

NET EQUIV. LOAD

CAP., C LOAD, (pF)

-18.0 -15.0

3.5 5.0

Analog Calibration

Value, AC,

register 0x12

0xC8 0xBC

On-Chip

CLOAD

=

CXI *

CXI +

CXO

CXO

DECREASING LOAD CAP.

INCREASING LOAD CAP.

-10.0

7.5

0xA8

-5.0

10

0x94

0.0

12.5

0x00

5.0

9.75

15

17.4

0x14 0x27

ai13906

25/51

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