參數(shù)資料
型號(hào)： M37512F8H-XXXHP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48
封裝： 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件頁數(shù)： 52/89頁
文件大小： 877K
代理商： M37512F8H-XXXHP
Feb 18, 2005
page 54 of 85
REJ03B0122-0101
7512 Group
Fig. 59 Block diagram of 32kHz RC oscillation circuit
1/2
91k
100pF
71.68k
35.84
70
512
resistor ladder
Vcc
2
(1.25V)
XCIN
XCOUT
R1
R2
C
R
32kHz oscillation circuit
control register 0,1
clock control circuit
comparator
Fig. 60 32kHz oscillation control register
b7 b6
b5
b4
b3
b2 b1
b7
b0
b8
b0
32kHz oscillation control register 0 (003216)
32kHz oscillation control register 1 (003316)
Fig. 61 High-speed RC oscillation register
High-speed RC oscillation
control register (0FF416) (Note 1,2)
b7
High-speed RC oscillation
frequency counter (0FF316) (Note 1,2)
b7 b6
b5
b4
b3
b2 b1
b7
b0
b8
b0
High-speed RC oscillation
frequency set up register (0FF216)
b7 b6
b5
b4
b3
b2 b1
b7
b0
Note 1 The first reading of high-speed RC oscillation frequency counter after enable high-speed RC
oscillation calibration must be read after nine clock cycle of 32kHZ oscillation clock.
Note 2 Read first 0FF316 and second 0FF416.
Note 3 When high-speed RC oscillation calibration enable bit is "1", set up the clock source high-speed
RC oscillation, and set up the main clock division ratio selection bits high-speed mode.
Bit8 of high-speed RC oscillation counter
Not used (Returns "0" when read)
High-speed RC oscillation
calibration enable bit (Note 3)
0 : disable
1 : enable
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