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CHAPTER 19 UART0, UART1
■
Rate and Data Register (URD) Contents
Table 19.3-3 Function of Each Bit of the Rate and Data Register
Bit name
Function
bit15,
bit10
BCH, BCH0:
Baud rate clock
change bits
Specifies the machine cycles for the baud rate clock (see Section "19.4 UART0,
UART1 Operation" for details).
bit14 to
bit11
RC3, RC2, RC1,
RC0
Selects the clock input for the UART0, UART1 port (see Section "19.4 UART0,
UART1 Operation" for details).
bit9
P:
Parity bit
Sets even or odd parity when parity is active (PEN = 1).
"0": Even parity
"1": Odd parity
bit8
D8:
UIDRn/UODRn
data bit 8
Holds the bit8 of the transfer data in mode 2 or 3 (9-bit data length) and no parity.
Treated as bit8 of the UIDR register for reading. Treated as bit8 of the UODR register
for writing. The bit has no meaning in the other modes. Write to D8 only when TDRE = 1
in the USR register.
BCH
BCH0
Divider
r
a
tio
S
etting ex
a
mple for different M
a
chine Cycle
s
0
6
For 24 MHz: 24/6 = 4 MHz
0
4
For 16 MHz: 16/4 = 4 MHz
1
3
For 12 MHz: 12/
3
= 4 MHz
1
5
0
1
0
1
For
For
20 MHz: 20/5 = 4 MHz;
10 MHz: 10/5 = 2 MHz
RC3 to
RC0
Clock Input
0000
B
to
1011
B
Dedicated baud rate generator
1101
B
16-bit Reload Timer 0
1111
B
External Clock
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
Страница 18: ...xiv ...
Страница 132: ...104 CHAPTER 5 CLOCKS ...
Страница 152: ...124 CHAPTER 6 CLOCK MODULATOR ...
Страница 210: ...182 CHAPTER 11 TIME BASE TIMER ...
Страница 218: ...190 CHAPTER 12 WATCHDOG TIMER ...
Страница 264: ...236 CHAPTER 14 16 BIT RELOAD TIMER WITH EVENT COUNT FUNCTION ...
Страница 274: ...246 CHAPTER 15 WATCH TIMER ...
Страница 306: ...278 CHAPTER 17 DTP EXTERNAL INTERRUPTS ...
Страница 338: ...310 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 364: ...336 CHAPTER 19 UART0 UART1 ...
Страница 398: ...370 CHAPTER 20 UART2 UART3 Figure 20 5 2 ORE Set Timing Receive data RDRF ORE ...
Страница 432: ...404 CHAPTER 20 UART2 UART3 ...
Страница 482: ...454 CHAPTER 22 SERIAL I O ...
Страница 560: ...532 CHAPTER 24 STEPPING MOTOR CONTROLLER ...
Страница 582: ...554 CHAPTER 27 ROM MIRRORING MODULE ...
Страница 632: ...604 CHAPTER 29 EXAMPLES OF SERIAL PROGRAMMING CONNECTION ...
Страница 722: ...694 APPENDIX ...
Страница 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
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