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3. TECHNICAL BRIEF
3.4 Clocks
There are two major time bases in the MT6253. For the faster one is the 26 MHz clock originated from the
digital control oscillator(DCXO) of RF block. This is then converted to the square-wave signal through
CLKSQ.
The other time base is the 32768 Hz clock generated by an on-chip oscillator connected to an external
crystal.
BT_CLK26M
LGE Internal Use Only
Figure. 3.4.1 Clock distributions inside the MT6253.
C103
CHG_EN
TSX-3225 26MHZ_7_4PF
26MHz
2
1
3
4
X102
Figure. 3.4.2 Crystal Oscillator External Connection
3. TECHNICAL BRIEF
M32
FREF
H6
4.7u
AU_VCM
Y6
PWM
K34
XTAL1
L33
XTAL2_GND
V4
AVDD_RTC
T4
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Only for training and service purposes
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