W83L517D_05 Datasheet, PDF (47/133 Pages) Winbond – LPC I/O for Notebook

W83L517D/W83L517D-F
UART Register Bit Map, continued.
REGISTER
ADDRESS BASE
UART
+5
Status
Register
USR
0
RBR
Data
Ready
(RDR)
Handshake
CTS
+6
Status HSR ^Toggling
Register
(TCTS)
User
+7
Defined UDR
Register
+ 0 _Baudrate
BDLAB ^{Divisor BLL}
= 1 ^{Latch Low}
+ 1 _Baudrate
BDLAB ^{Divisor BHL}
= 1 ^{Latch High}
Bit 0
Bit 0
Bit 8
BIT NUMBER
1
2
3
4
5
6
7
Overrun
Error
(OER)
Parity Bit
Error
(PBER)
No Stop
Bit
Error
(NSER)
Silent
Byte ^TBR
Detecte ^Empty
d _(TBRE)
(SBD)
TSR
Empty
(TSRE)
RX FIFO
Error
Indicatio
n (RFEI)
**
DSR
Toggling
(TDSR)
RI Falling
Edge
DCD
Toggling
Clear
to Send
Data
Set
Ready
(FERI) (TDCD) (CTS) _(DSR)
Ring
Indicator
(RI)
Data
Carrier
Detect
(DCD)
Bit 1
Bit 2
Bit 3 Bit 4 Bit 5 Bit 6
Bit 7
Bit 1
Bit 2
Bit 3 Bit 4 Bit 5 Bit 6
Bit 7
Bit 9
Bit 10 Bit 11 Bit 12 Bit 13 Bit 14 Bit 15
*: Bit 0 is the least significant bit. The least significant bit is the first bit serially transmitted or received.
**: These bits are always 0 in 16450 Mode.
Bit 4: EPE. This bit describes the number of logic 1's in the data word bits and parity bit only when bit
3 is programmed. When this bit is set, an even number of logic 1's are sent or checked. When the bit
is reset, an odd number of logic 1's are sent or checked.
Bit 3: PBE. When this bit is set, the position between the last data bit and the stop bit of the SOUT will
be stuffed with the parity bit at the transmitter. For the receiver, the parity bit in the same position as
the transmitter will be detected.
Bit 2: MSBE. This bit defines the number of stop bits in each serial character that is transmitted or
received.
(1) If MSBE is set to a logical 0, one stop bit is sent and checked.
(2) If MSBE is set to a logical 1, and data length is 5 bits, one and a half stop bits are sent and
checked.
(3) If MSBE is set to a logical 1, and data length is 6, 7, or 8 bits, two stop bits are sent and checked.
Bits 0 and 1: DLS0, DLS1. These two bits define the number of data bits that are sent or checked in
each serial character.
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Publication Release Date: May 23, 2005
Revision 1.0