Model
MASS 2
Version
V_1.0
Prepared by
H/W
Date
22/01/2008
Subject Technical
Manual Page
36/59
Figure 38. The AFC and VCTCXO Circiut diagram
8.
Clocks and Reset
Clocks
There are two major time bases in the MT6228. For the faster one is the 13MHz clock origination from an off-chip
temperature-compensated voltage controlled oscillator that can be 26MHz. This signal is the input from the SYSCLK pad then
is converted to the square-wave signal. The other time base is the 32.768KHz clock generated by an on-chip oscillator
connected to an external crystal.
- 32.768Khz Time Base
The 32.768Khz clock is always running. It’s mainly used as the time base of the Real Time Clock(RTC) module,
which maintains time and date with counters. In low power mode, the 13Mhz time base is turned off, so the
32.768Khz clock shall be employed to update the critical TDMA timer and Watchdog timer. This Time base is also
used to clock the keypad Scanner logic. The C101,C102 must be tuned with Oscillator.
- 13Mhz Time Base
Two 1/2-dividers, one for MCU Clock and the other for DSP Clock, exist to allow usage of either 26 or 13Mhz
TXVCXO as clock input. There phase-locked loops(MPLL, DPLL and UPLL) are used to generate three primary
clocks.
MPLL : Provides the MCU System Clock.
DPLL : Provides the DSP System Clock. DPLL can be programmed to provide 1x to 6x
output of the 13Mhz reference.
UPLL : Provides the USB System Clock.
Reset Generation Unit
Содержание MASS2
Страница 20: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 9 11 ...
Страница 30: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 8 59 Pin Description ...
Страница 31: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 9 59 ...
Страница 32: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 10 59 ...
Страница 33: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 11 59 ...
Страница 34: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 12 59 ...
Страница 35: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 13 59 ...
Страница 36: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 14 59 ...
Страница 37: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 15 59 ...
Страница 62: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 40 59 ...
Страница 88: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 7 42 ...
Страница 89: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 8 42 ...
Страница 95: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 14 42 ...
Страница 103: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 22 42 ...
Страница 104: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 23 42 ...
Страница 106: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 25 42 Pin out for U100 MT6225 ...
Страница 107: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 26 42 ...
Страница 108: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 27 42 ...
Страница 109: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 28 42 ...
Страница 110: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 29 42 ...
Страница 111: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 30 42 ...
Страница 112: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 31 42 ...
Страница 113: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 32 42 ...
Страница 114: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 33 42 ...
Страница 115: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 34 42 ...
Страница 116: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 35 42 ...
Страница 119: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 38 42 Pin out for U920 MT6120 ...
Страница 120: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 39 42 ...
Страница 121: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 40 42 ...
Страница 126: ...MAIN BOARD MAP ...
Страница 127: ......
Страница 128: ......
Страница 129: ......
Страница 130: ......
Страница 131: ......
Страница 132: ......
Страница 133: ......
Страница 134: ......
Страница 135: ......
Страница 136: ......
Страница 137: ......