RDC
®
RISC DSP Controller
R8810LV
RDC Semiconductor Co.
Rev:1.2
Subject to change without notice
64
It should to check the TEMT bit (82h.6) is a 1 before setting the BRK bit.
Set 1: The serial port send a frame of continues level output on the TXD pin and the output level depends on the
BRAVAL bit status, when any data is written to transmit data register.
Bit 7: BRKVAL
, Break Value.
Set 1: TXD pin continuous drive high level signal during send break operation.
Set 0: TXD pin continuous drive low level signal during send break operation.
Bit 6-5: PMODE
, Parity Mode. Parity generation and checking during transmission and reception.
Parity mode selection by (Bit 6 , Bit 5) : ( 0 , x) – No parity bit in frame , ( 1 , 0) – Odd number of 1s in frame.
( 1 , 1 ) – Even number of 1s in frame.
Bit 4: WLGN
, Word Length.
Set 1: The serial port sends and receives 8 bits of data per frame.
Set 0: The serial port sends and receives 7 bits of data per frame.
Bit 3: STP
, Stop Bits.
Set 1: Two stop bits are used to signify the end of a frame.
Set 0: One stop bit are used to signify the end of a frame.
Bit 2: TMODE
, Transmit Mode.
Set 1: Enable the transmit section of the serial port.
Set 0: Disable the transmit section of the serial port.
Bit 1: RSIE
, Receive Status interrupt Enable.
Set 1: Enable the receive section of serial port to generate an interrupt
Set 0: Disable the receive section of serial port to generate an interrupt
Bit 0: RMODE
, Receive Mode.
Set 1: Enable the receive section of the serial port.
Set 0: Disable the receive section of the serial port.
Bit 15-7
: Reserved
Bit 6: TEMT
, Transmitter Empty. Read only bit. This bit is set by H/W when the the transmit shift register is empty. It can
not disable the transmit function when the bit is 0.
Bit 5: THRE
, Transmit Holding Register Empty. Read only bit. When this bit is 1, the transmit holding buffer contains
invalid data and the transmit data register (84h) can be written a new data. When this bit is 0, it indicate that transmit
holding buffer contains valid data that not yet been copied to transmit shift register and the transmit data register (84h)
Offset : 82h
0
Reset Value :
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Reserved
Serial Port Status Register
TEMT THRE
RDR
BRK1
FER
PER
OER