XR16C850 Datasheet, PDF (23/55 Pages) Exar Corporation – UART with 128-byte FIFO’s FIFO Counters and Half-duplex Control

XR16C850
D0-D7
-IOR,IOR
-IOW,IOW
RESET
A0-A2
-AS
CS0,CS1
-CS2
-DDIS
INT
-RXRDY
-TXRDY
XTAL1
RCLK
XTAL2
-BAUDOUT
Transmit
FIFO
Registers
Flow
Control
Logic
Receive
FIFO
Registers
Flow
Control
Logic
Transmit
Shift
Register
Ir
Encoder
Receive
Shift
Register
Ir
Decoder
Rev. 1.20
Figure 12. INTERNAL LOOPBACK MODE DIAGRAM
23
TX
RX
-RTS
-CD
-DTR
-RI
-OP1
-DSR
-OP2
-CTS