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CHAPTER 19 UART
19.2
Configuration of UART
The UART consists of the serial mode register, serial control register, serial status
register, communication prescaler control register and serial input/output register.
■
UART Block Diagram
Figure 19.2-1 shows a block diagram of the UART.
Figure 19.2-1 Block diagram of the UART
Control signal
Dedicated baud
rate generator
PPG1
(internal connection)
External clock
Clock
selector
circuit
Reception
clock
Transmission clock
Reception interrupt (to CPU)
SCK0
Send interrupt (to CPU)
Reception control
circuit
Start-bit
detector
circuit
Transmission
start circuit
Reception
bit counter
Reception
parity
counter
Transmission
bit counter
Transmission
parity counter
Transmission
control circuit
SIN0
Reception state
detection circuit
Reception
shift register
Transmission
shift register
DMAC reception
error transmission
signal (to CPU)
Reception
control circuit
Transmission
start
Serial input
register (SIDR)
Serial output
register (SODR)
F
2
MC-16LX bus
Serial
mode
register
(SMR)
Serial
control
register
(SCR)
Serial
status
register
(SSR)
MD1
MD0
CS2
CS1
CS0
SCKE
SOE
PEN
P
SBL
CL
A/D
REC
REX
TXE
PE
ORE
FRE
RDRF
TDRE
BDS
RIE
TIE
Control signal
SOT0
Summary of Contents for MB90480 Series
Page 2: ......
Page 4: ......
Page 10: ...vi ...
Page 128: ...106 CHAPTER 4 RESET ...
Page 174: ...152 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 198: ...176 CHAPTER 7 MODE SETTING ...
Page 220: ...198 CHAPTER 9 TIMEBASE TIMER ...
Page 238: ...216 CHAPTER 11 WATCH TIMER ...
Page 280: ...258 CHAPTER 12 16 BIT INPUT OUTPUT TIMER ...
Page 406: ...384 CHAPTER 17 8 10 BIT A D CONVERTER ...
Page 478: ...456 CHAPTER 20 CHIP SELECTION FACILITY ...
Page 494: ...472 CHAPTER 21 ADDRESS MATCH DETECTION FUNCTION ...
Page 498: ...476 CHAPTER 22 ROM MIRROR FUNCTION SELECTION MODULE ...
Page 526: ...504 CHAPTER 23 2M 3M BIT FLASH MEMORY ...
Page 536: ...514 CHAPTER 24 EXAMPLES OF MB90F481B MB90F482B MB90F488B MB90F489B SERIAL PROGRAMMING ...
Page 570: ...548 CHAPTER 25 PWC TIMER ONLY MB90485 SERIES ...
Page 688: ......