xr16v2650im Exar Corporation, xr16v2650im Datasheet - Page 28

• Manufacturer Part Number: xr16v2650im
• Description: High Performance Duart With 32-byte Fifo
• Manufacturer: Exar Corporation

XR16V2650
HIGH PERFORMANCE DUART WITH 32-BYTE FIFO
LCR[2]: TX and RX Stop-bit Length Select
The length of stop bit is specified by this bit in conjunction with the programmed word length.
LCR[3]: TX and RX Parity Select
Parity or no parity can be selected via this bit. The parity bit is a simple way used in communications for data
integrity check. See
•
•
LCR[4]: TX and RX Parity Select
If the parity bit is enabled with LCR bit-3 set to a logic 1, LCR bit-4 selects the even or odd parity format.
•
•
LCR[5]: TX and RX Parity Select
If the parity bit is enabled, LCR BIT-5 selects the forced parity format.
•
•
•
Logic 0 = No parity.
Logic 1 = A parity bit is generated during the transmission while the receiver checks for parity error of the
data character received.
Logic 0 = ODD Parity is generated by forcing an odd number of logic 1’s in the transmitted character. The
receiver must be programmed to check the same format (default).
Logic 1 = EVEN Parity is generated by forcing an even number of logic 1’s in the transmitted character. The
receiver must be programmed to check the same format.
LCR BIT-5 = logic 0, parity is not forced (default).
LCR BIT-5 = logic 1 and LCR BIT-4 = logic 0, parity bit is forced to a logic 1 for the transmit and receive data.
LCR BIT-5 = logic 1 and LCR BIT-4 = logic 1, parity bit is forced to a logic 0 for the transmit and receive data.
LCR B
X
0
0
1
1
IT
-5
Table 12
LCR B
X
0
1
0
1
IT
-4
for parity selection summary below.
BIT-2
0
1
1
LCR B
T
ABLE
0
1
1
1
1
LENGTH
IT
5,6,7,8
W
6,7,8
-3
ORD
5
12: P
ARITY SELECTION
28
S
TOP BIT LENGTH
(B
1 (default)
IT TIME
1-1/2
2
Force parity to space, LOW
Force parity to mark, HIGH
(
S
))
P
ARITY SELECTION
Even parity
Odd parity
No parity
REV. 1.0.2