MC68HC912D60 Motorola, MC68HC912D60 Datasheet - Page 162
MC68HC912D60
Manufacturer Part Number
MC68HC912D60
Description
Microcontrollers
Manufacturer
Motorola
Datasheet
1.MC68HC912D60.pdf
(460 pages)
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Clock Functions
11.7 System Clock Frequency formulas
11.8 Clock Divider Chains
Technical Data
162
NOTE:
See
SLWCLK = EXTALi / ( 2 x SLOW )
SLWCLK = EXTALi
PLLCLK = 2 x EXTALi x (SYNR + 1) / (REFDV + 1)
ECLK = SYSCLK / 2
XCLK = SLWCLK / 2
PCLK = SYSCLK / 2
BCLK
Boolean equations:
SYSCLK = (BCSP & PLLCLK) | (BCSP & BCSS & EXTALi) | (BCSP &
BCSS & SLWCLK)
MCLK = (PCLK & MCS) | (XCLK & MCS)
MSCAN system = (EXTALi & CLKSRC) | (SYSCLK & CLKSRC)
BDM system = (BCLK & CLKSW) | (ECLK & CLKSW)
During limp-home mode PCLK, ECLK, BCLK, MCLK and XCLK are
supplied by VCO (PLLCLK).
Figure
clock divider chains for the various peripherals on the
MC68HC912D60A.
1. If SYSCLK is slower than EXTALi (BCSS=1, BCSP=0, SLOW>0), BCLK becomes ECLK.
Freescale Semiconductor, Inc.
Figure
For More Information On This Product,
(1)
11-6,
= EXTALi / 2
11-6:
Go to: www.freescale.com
Figure
Clock Functions
11-7,
Figure
11-8, and
Figure 11-9
MC68HC912D60A — Rev 3.0
SLOW = 1,2,..63
SLOW = 0
summarize the
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