XR16L788 Datasheet, PDF (37/42 Pages) Exar Corporation – HIGH PERFORMANCE OCTAL UART

XR16L788 OCTAL UART
REV. 1.1.4
FIGURE 17. MODEM INPUT/OUTPUT PORT DELAY
IO W #
RTS#
DTR#
A c tiv e
Change of
State
T17D
Change of
State
CD#
CTS#
DSR#
IN T
T18D
Change of
State
A c tiv e
IO R#
A c tiv e
R I#
áç
Change of
State
T18D
T19D
A c tiv e
A c tiv e
A c tiv e
A c tiv e
T18D
Change of
State
M odem -1
FIGURE 18. TRANSMIT DATA INTERRUPT AT TRIGGER LEVEL
START
BIT
DATA BITS (5-8)
STOP
BIT
TX Data
D0 D1 D2 D3 D4 D5 D6 D7
5 DATA BITS
PARITY
BIT
6 DATA BITS
7 DATA BITS
NEXT
DATA
START
BIT
TX Interrupt at
Transmit Trigger Level
Set at Below
Trigger Level
Clear at
Above
Trigger Level
BAUD RATE CLOCK of 16X or 8X
37
TXNOFIFO-1