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484
CHAPTER 17 UART
17.4.5
Communication Prescaler Control Register (CDCR)
This register controls the division of machine clocks.
■
Communication Prescaler Control Register (CDCR)
The operation clocks of UART can be obtained by dividing machine clocks. UART is designed to obtain
certain baud rates for various machine cycles. Output from the communication prescaler is used for the
operation clocks of I/O extended serial interfaces. The CDCR bit configuration is shown below.
Figure 17.4-7 Communication Prescaler Control Register
Address bit 15
14
13
12
11
10
9
8
Initial value
000019
H
00001B
H
MD
—
—
—
—
DIV2
DIV1
DIV0
0XXXX000
B
R/W
—
—
—
—
R/W
R/W
R/W
MD
DIV2
DIV1
DIV0
div
0
—
—
—
Setting not allowed
1
0
0
0
1
1
0
0
1
2
1
0
1
0
3
1
0
1
1
4
1
1
0
0
5
1
1
0
1
6
1
1
1
0
7
1
1
1
1
8
MD
Machine clock divide mode select
0
Stops the communication prescaler.
1
Operates the communication prescaler.
X :
Indeterminate
R/W : Read and write
: Initial value
—
: Not used
Содержание MB90460 Series
Страница 1: ...The following document contains information on Cypress products ...
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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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