m41t93 STMicroelectronics, m41t93 Datasheet - Page 25

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

Figure 11. Clock accuracy vs. on-chip load capacitors
Analog Calibration
NET EQUIV. LOAD
CAP., C
register 0x12
C
OFFSET TO
100.0
-20.0
XI
Value, AC,
80.0
60.0
40.0
20.0
LOAD
, C
0.0
XO
, (pF)
(pF)
SLOWER
FASTER
-18.0 -15.0
0xC8 0xBC
3.5
5.0
DECREASING LOAD CAP.
-10.0
0xA8
7.5
0x94
-5.0
10
On-Chip
C
XI
XI
0x00
12.5
0.0
INCREASING LOAD CAP.
Oscillator
Crystal
C
LOAD
C
=
0x14
XO
5.0
15
C
C
XI
XI
XO
+ C
*
C
XO
XO
ai13906
0x27
9.75
17.4
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