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AT89C5131A-RDTUM датащи(PDF) 64 Page - ATMEL Corporation

номер детали AT89C5131A-RDTUM
подробное описание детали  8-bit Flash Microcontroller with Full Speed USB Device
PDF  184 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5131A-RDTUM датащи(HTML) 64 Page - ATMEL Corporation

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AT89C5130A/31A-M
4337C–USB–02/05
Figure 28. PCA Compare Mode and PCA Watchdog Timer
Note:
1.
Only for Module 4
Before enabling ECOM bit, CCAPnL and CCAPnH should be set with a non zero value,
otherwise an unwanted match could happen. Writing to CCAPnH will set the ECOM bit.
Once ECOM set, writing CCAPnL will clear ECOM so that an unwanted match doesn’t
occur while modifying the compare value. Writing to CCAPnH will set ECOM. For this
reason, user software should write CCAPnL first, and then CCAPnH. Of course, the
ECOM bit can still be controlled by accessing to CCAPMn register.
High Speed Output Mode In this mode, the CEX output (on port 1) associated with the PCA module will toggle
each time a match occurs between the PCA counter and the module's capture registers.
To activate this mode the TOG, MAT, and ECOM bits in the module's CCAPMn SFR
must be set (see Figure 29).
A prior write must be done to CCAPnL and CCAPnH before writing the ECOMn bit.
CH
CL
CCAPnH
CCAPnL
ECOMn
CCAPMn, n = 0 to 4
0xDA to 0xDE
CAPNn MATn TOGn PWMn ECCFn
CAPPn
16-bit Comparator
Match
CCON
0xD8
PCA IT
Enable
PCA Counter/Timer
RESET
(1)
CIDL
CPS1
CPS0
ECF
CMOD
0xD9
WDTE
Reset
Write to
CCAPnL
Write to
CCAPnH
CF
CCF2
CCF1
CCF0
CR
CCF3
CCF4
10



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