參數(shù)資料
型號(hào): MC68HC08GP8AMFB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.2 MHz, MICROCONTROLLER, PQFP44
封裝: PLASTIC, QFP-44
文件頁數(shù): 76/126頁
文件大?。?/td> 4243K
代理商: MC68HC08GP8AMFB
Clock Generator Module (CGM)
Functional Description
MC68HC08GP8A
Data Sheet
MOTOROLA
Clock Generator Module (CGM)
53
4.
Select a VCO frequency multiplier, N.
Reduce N/R to the lowest possible R.
5.
If N is < Nmax, use P = 0. If N > Nmax, choose P using this table:
Then recalculate N:
6.
Calculate and verify the adequacy of the VCO and bus frequencies fVCLK
and fBUS.
7.
Select the VCO’s power-of-two range multiplier E, according to this table:
8.
Select a VCO linear range multiplier, L, where fNOM = 38.4 kHz
Current N Value
P
0
1
2
3
Frequency Range
E(1)
1. Do not program E to a value of 3.
0 < fVCLK < 8 MHz
0
8 MHz
≤ f
VCLK < 16 MHz
1
16 MHz
≤ f
VCLK < 32 MHz
2
N
round
Rf
VCLKDES
×
f
RCLK
-------------------------------------
=
0N
<N
max
N
max
N
<N
max
2
×
N
max
2
×
N
<N
max
4
×
N
max
4
×
N
<N
max
8
×
N
round
Rf
VCLKDES
×
f
RCLK
2
P
×
-------------------------------------
=
f
VCLK
2
P
NR
×
() f
RCLK
×
=
f
BUS
f
VCLK
() 4
=
L
round
n
f
VCLK
2
E
f
NOM
×
--------------------------
=
F
re
e
sc
a
le
S
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ic
o
n
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I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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