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CHAPTER 17 UART
Figure 17.6-1 Baud Rate Selection Circuit
Frequency divider
(synchronous)
Frequency divider
(asynchronous)
Selects the internal fixed
division ratios
1/1 (synchronous)
1/16 (asynchronous)
1/1 (synchronous)
1/16 (asynchronous)
SMR0/SMR1 : MD1
(Synchronous or asynchronous clock selection)
Baud rate
Clock selector
Down
counter
Pin
P42/SCK0, P62/SCK1
[External clock]
Prescaler
UF
16-bit reload timer 0
TMCSR0/TMCSR1 : CSL1, CSL0
2
3
SMR0/SMR1 : CS2 to CS0
(Clock selection bits)
[Dedicated baud rate generator]
[Internal timer]
φ
: Machine clock frequency
φ
φ
/2
1
φ
/2
3
φ
/2
5
When the bits
are 110
B
When the bits
are 111
B
When the bits
are 000
B
to 101
B
Clock selector
φ
CDCR0/CDCR1 : MD, DIV2 to DIV0
(Prescaler enable and selection bits)
Machine clock prescaler
4
SCKI
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: ......