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ABOV Semiconductor
UART
Un.LSR
UART Line Status Register
9.3.7
UART Line Status Register is 8-bit register.
U0.LSR=0x4000_8014, U1.LSR=0x4000_8114
7
6
5
4
3
2
1
0
-
TEMT
THRE
BI
FE
PE
OE
DR
0
1
1
0
0
0
0
0
R
R
R
R
R
R
R
6
TEMT
Transmit empty.
0
Transmit register has the data is now transferring
1
Transmit register is empty.
5
THRE
Transmit holding empty.
0
Transmit holding register is not empty.
1
Transmit holding register empty
4
BI
Break condition indication bit
0
Normal status
1
Break condition is detected
3
FE
Frame Error.
0
No framing error.
1
Framing error. The receive character did not have a valid
stop bit
2
PE
Parity Error
0
No parity error
1
Parity error. The receive character does not have correct
parity information.
1
OE
Overrun error
0
No overrun error
1
Overrun error. Additional data arrives while the RHR is full
0
DR
Data received
0
No data in receive holding register.
1
Data has been received and is saved in the receive holding
register
This register provides the status of data transfers between transmitter and receiver. User can get the line status
information from this register and can handle the next process. Bit 1,2,3,4 will arise the line status interrupt when RLSIE
bit in Un.IEN register is set. Other bits can generate its interrupt when its interrupt enable bit in Un.IEN register is set.
Summary of Contents for AC30M1x64
Page 3: ...3 246 ABOV Semiconductor INTRODUCTION SECTION 1 INTRODUCTION...
Page 4: ...4 246 4 246 AC30M1x64 1x32 ABOV Semiconductor OVERVIEW CHAPTER 1...
Page 18: ...18 246 18 246 ABOV Semiconductor AC30M1x64 1x32 CPU CHAPTER 2...
Page 22: ...22 246 22 246 ABOV Semiconductor AC30M1x64 1x32 Boot Mode CHAPTER 3...
Page 26: ...26 246 26 246 ABOV Semiconductor AC30M1x64 1x32 SECTION 2 PERIPHERALS...
Page 27: ...27 246 ABOV Semiconductor System Control Unit SCU SYSTEM CONTROL UNIT SCU CHAPTER 1...
Page 69: ...69 246 ABOV Semiconductor Port Control Unit PCU PORT CONTROL UNIT PCU CHAPTER 2...
Page 85: ...85 246 ABOV Semiconductor General Purpose I O GPIO GENERAL PURPOSE I O GPIO CHAPTER 3...
Page 92: ...92 246 92 246 AC30M1x64 1x32 ABOV Semiconductor FLASH MEMORY CONTROLLER CHAPTER 4...
Page 105: ...105 246 ABOV Semiconductor Internal SRAM INTERNAL SRAM CHAPTER 5...
Page 107: ...107 246 ABOV Semiconductor Watch Dog Timer WATCH DOG TIMER WDT CHAPTER 6...
Page 113: ...113 246 ABOV Semiconductor 16 bit Timer 16 BIT TIMER CHAPTER 7...
Page 129: ...129 246 ABOV Semiconductor FRT FREE RUN TIMER FRT CHAPTER 8...
Page 134: ...134 246 134 246 ABOV Semiconductor AC30M1x64 1x32 FUNCTION DESCRIPTION 8 3...
Page 135: ...135 246 UART ABOV Semiconductor UNIVERSAL ASYNCHRONOUS CHAPTER 9 RECEIVER TRANSMITTER UART...
Page 151: ...151 246 ABOV Semiconductor UART Figure 9 6 Transmit interrupt timing diagram...
Page 152: ...152 246 152 246 ABOV Semiconductor AC30M1x64 1x32 SERIAL PERIPHERAL INTERFACE SPI CHAPTER 10...
Page 164: ...164 246 164 246 ABOV Semiconductor AC30M1x64 1x32 I2 C Interface CHAPTER 11...
Page 185: ...185 246 ABOV Semiconductor Motor PWM MOTOR PULSE WIDTH MODULATOR CHAPTER 12 MPWM...
Page 215: ...215 246 ABOV Semiconductor Divider DIVIDER DIV64 CHAPTER 13...
Page 221: ...221 246 ABOV Semiconductor 12 BIT A D Converter 12BIT A D CONVERTER CHAPTER 14...
Page 235: ...235 246 ABOV Semiconductor CHARACTERISTIC SECTION 3 CHARACTERISTIC...
Page 236: ...236 246 236 246 ABOV Semiconductor AC30M1x64 1x32 Electrical Characteristic CHAPTER 1...
Page 243: ...243 246 ABOV Semiconductor Package Package CHAPTER 2...