RDC
®
RISC DSP Controller
R8810LV
RDC Semiconductor Co.
Rev:1.2
Subject to change without notice
65
can not be written a new data.
When the transmit interrupt is enabled, a serial port interrupt is generated when this bit is 1. The THRE bit is
automatically cleared by H/W during copy data to transmit holding buffer.
Bit 4: RDR
, Receive Data Ready. Read only bit. When the receive data register is ready to read, this bit is 1. When the bit is
0, the receive data register dose not contain valid data. This bit will be cleared by H/W when reading the receive data
register.
Bit 3: BRKI
, Break Interrupt. It indicates that a break has been receive when this bit is set 1 and it will generate a serial pot
interrupt request if the RISE bit (80h.1) is enabled. This bit is set by H/W and should be cleared by software.
Bit 2: FER
, Framing Error. This bit is set to indicate that a framing error occurred during reception of data and it will
generate a serial pot interrupt request if the RISE bit (80h.1) is enabled. This bit is set by H/W and should be cleared by
software.
Bit 1: PER
, Parity Error. This bit is set to indicate that a party error occurred during reception of data and it will generate a
serial pot interrupt request if the RISE bit (80h.1) is enabled. This bit is set by H/W and should be cleared by software.
Bit 0: OER
, Overrun Error. This bit is set to indicate that a overrun error occurred during reception of data and it will
generate a serial port interrupt request if the RISE bit (80h.1) is enabled. This bit is set by H/W and should be cleared
by software.
Bit 15-8
: Reserved
Bit 7-0
: TDATA, Transmit Data. Software writes this register with data to be transmitted on the serial port.
The THRE bit (82h.5) should be read as a 1 before writing this register to avoid overwriting data to this register.
When writing data to this register, the THRE bit will be cleared by H/W in the same time.
Bit 15-8
: Reserved
Bit 7-0: RDATA
, Received DATA. The PDR bit (82h.4) should be read as 1 before read the RDATA register to avoid reading
invalid data.
Offset : 84h
0
Reset Value :
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Reserved
Serial Port Transmit Data Register
TDATA
Offset : 86h
0
Reset Value :
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Reserved
Serial Port Receive Data Register
RDATA