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494
CHAPTER 17 UART
●
Internal timer
When CS2 to CS0 are set to "110
B
" and the internal timer is selected, the formulas for calculating baud
rates (when using the reload timer) are as follows:
Asynchronous (start-stop synchronization): (
φ÷
N) / (16
×
2
×
(n + 1))
CLK synchronization: (
φ÷
N) / (2
×
(n + 1))
N: Division ratio for the prescaler of 16-bit re-load timer count clock
n: reload value of the 16-bit reload timer
Note:
In mode 2 (CLK synchronization mode), SCK0/SCK1 is up to three clocks later than SCKI. A
logically attainable transfer rate is 1/3 of the system clock frequency. However, 1/4 of the system
clock frequency is recommended as taken from the actual specifications.
●
External clock
When CS2 to CS0 are set to "111
B
" and the external clock is selected, note the following:
If the external clock frequency is specified as f, the following baud rates are assumed:
Asynchronous (start-stop synchronization): f/16
CLK synchronization: f
Note that the maximum external clock frequency f is 2 MHz.
Содержание MB90460 Series
Страница 1: ...The following document contains information on Cypress products ...
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Страница 9: ...iv ...
Страница 41: ...22 CHAPTER 1 OVERVIEW ...
Страница 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Страница 83: ...64 CHAPTER 3 CPU ...
Страница 95: ...76 CHAPTER 4 RESET ...
Страница 107: ...88 CHAPTER 5 CLOCK ...
Страница 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Страница 175: ...156 CHAPTER 7 INTERRUPT ...
Страница 181: ...162 CHAPTER 8 MODE SETTING ...
Страница 223: ...204 CHAPTER 9 I O PORT ...
Страница 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Страница 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Страница 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Страница 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Страница 485: ...466 CHAPTER 16 PWC Timer ...
Страница 531: ...512 CHAPTER 17 UART ...
Страница 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Страница 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Страница 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Страница 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Страница 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Страница 715: ...696 APPENDIX ...
Страница 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
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