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HMS91C8032 датащи(PDF) 77 Page - Hynix Semiconductor

номер детали HMS91C8032
подробное описание детали  HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS
PDF  157 Pages
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производитель  HYNIX [Hynix Semiconductor]
домашняя страница  http://www.skhynix.com/kor/main.do
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HMS91C8032 датащи(HTML) 77 Page - Hynix Semiconductor

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HMS91C8032/97C8032
74
NOV., 2001 Ver 1.02
Example) FMIFC : 10.7 MHz
Gate Time : 32 ms
N = (FFMIFC / 4) x TGATE = (10.7MHz/4) x 32ms
= 85600 (decimal) = 14E60H (hexadecimal)
(2) AMIF count mode (AMIFC pin)
FAMIFC = N / TGATE (KHz)
N : AMIF Count Register Value
Example) AMIFC : 450 MHz
Gate Time : 32 ms
N = FAMIFC x TGATE = 450 KHz x 32ms
= 14400 (decimal) = 3840H (hexadecimal)
Notes on Frequency Counter
(1) Notes on using frequency counter
Because signals are input to the frequency counter from an input
pin (FMIFC or AMIFC pin) with an AC amplifier as shown in
Figure 4-34Because signals are input to the frequency counter
Figure 4-32 Input Pin and Mode Selection Block Diagram
Figure 4-33 Gate Timing of Frequency Counter
FMIFC
AMIFC
AMP
1/4
IF Counter
Register
FMIF Counter Mode
AMIF Counter Mode
AMP
8ms
32ms
128ms
Counting starts
Sets IFCST
Clears IFCST
Sets IFCJR
Clears IFCJR if IFCMOD is read or
IF counter interrupt service routine is started.
Internal
250Hz
8ms
32ms
128ms
IFCST
IFCJR
{
(8/32/128ms)
(8/32/128ms)
Counting ends



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