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PWM TIMER
S3C2416X RISC MICROPROCESSOR
12-4
2.2 BASIC TIMER OPERATION
Figure 12-2. Timer Operations
A timer (except the timer ch-4) has TCNTBn, TCNTn, TCMPBn and TCMPn. The TCNTBn and the TCMPBn are
loaded into the TCNTn and the TCMPn when the timer reaches 0.
When the TCNTn reaches 0, an interrupt request will occur if the interrupt is enabled.
NOTE
TCNTn and TCMPn are the names of the internal registers. (16bit Internal down-counter (register) and
16bit internal compare register, respectively.) The TCNTn register can be read from the TCNTOn register
If you want to generate interrupt at intervals 3cycle of TOUTn, set TCNTBn, TCMPBn and TCON register like
Figure 12-2. That is :
i)
Set TCNTBn=3 and TCMPBn=1.
ii)
Set auto-reload=1 and manual update=1.
When manual update bit is 1, TCNTBn and TCMPBn value are loaded to TCNTn and TCMPn.
iii)
Set TCNTBn=2 and TCMPBn=0 for next operation.
iv)
Set auto-reload=1 and manual update=0.
If you set manual update=1 at this time, TCNTn is changed to 2 and TCMP is changed to 0.
So, interrupt is generated at interval 2cycle instead of 3cycle.
You must set auto-reload=1 automatically for next operation.
v)
Set start = 1 for operation start and then TCNTn is down counting.
When TCNTn is 0, interrupt is generated and If auto-reload is enable, TCNTn is loaded 2
(TCNTBn value) and TCMPn is loade 0(TCMPn value).
vi)
Before stop, TCNTn is down counting.
Содержание S3C2416
Страница 33: ...S3C2416X RISC MICROPROCESSOR PRODUCT OVERVIEW 1 5 3 BLOCK DIAGRAM Figure 1 1 S3C2416X Block Diagram ...
Страница 38: ...PRODUCT OVERVIEW S3C2416X RISC MICROPROCESSOR 1 10 153 AIN 1 U14 195 EINT 10 GPG2 K15 237 SDATA 14 C18 ...
Страница 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Страница 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Страница 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Страница 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Страница 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Страница 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Страница 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Страница 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Страница 455: ...S3C2416X RISC MICROPROCESSOR HSMMC CONTROLLER 20 9 4 9 SD COMMAND ISSUE SEQUENCE Figure 20 9 Timeout Setting Sequence ...
Страница 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Страница 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Страница 653: ...S3C2416X RISC MICROPROCESSOR ELECTRICAL DATA 26 15 Figure 26 14 SDRAM READ WRITE Timing Trp 2 Trcd 2 Tcl 2 DW 16 bit ...
Страница 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...
Страница 672: ...MECHANICAL DATA S3C2416X RISC MICROPROCESSOR 30 2 Figure 27 2 330 FBGA 1414 Package Dimension 2 Bottom View ...