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CHAPTER 17 UART
17.6
UART Baud Rates
One of the following can be selected as the UART transmitting/receiving block, the
block diagram show as below.
■
UART Baud Rate Selection
The baud rate selection circuit is designed as shown below. One of the following three types of baud rates
can be selected:
●
Baud rates determined using the dedicated baud rate generator
UART has an internal dedicated baud rate generator. One of eight baud rates can be selected using the
mode control register (SMR0/SMR1).
An asynchronous or synchronous baud rate is selected using the machine clock frequency by setting the
CS2 to CS0 bits of the mode control register (SMR0/SMR1).
●
Baud rates determined using the internal timer
The internal clock supplied from 16-bit reload timer 0 is used as it is (synchronous) or by dividing it by 16
(asynchronous) for the baud rate. Any baud rate can be set by setting the reload value.
●
Baud rates determined using the external clock
The clock input from the UART clock pulse input pins (P42/SCK0 and P62/SCK1) is used as it is
(synchronous) or by dividing it by 16 (asynchronous) for the baud rate. Any baud rate can be set
externally.
Summary of Contents for MB90460 Series
Page 1: ...The following document contains information on Cypress products ...
Page 3: ......
Page 5: ......
Page 9: ...iv ...
Page 41: ...22 CHAPTER 1 OVERVIEW ...
Page 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Page 83: ...64 CHAPTER 3 CPU ...
Page 95: ...76 CHAPTER 4 RESET ...
Page 107: ...88 CHAPTER 5 CLOCK ...
Page 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 175: ...156 CHAPTER 7 INTERRUPT ...
Page 181: ...162 CHAPTER 8 MODE SETTING ...
Page 223: ...204 CHAPTER 9 I O PORT ...
Page 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Page 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Page 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Page 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Page 485: ...466 CHAPTER 16 PWC Timer ...
Page 531: ...512 CHAPTER 17 UART ...
Page 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Page 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Page 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Page 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Page 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Page 715: ...696 APPENDIX ...
Page 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 739: ......