xr88c92 Exar Corporation, xr88c92 Datasheet - Page 4

• Manufacturer Part Number: xr88c92
• Description: Xr88c92 -dual Uart With 8 Bytes Transmit And Receive Fifo
• Manufacturer: Exar Corporation

XR88C92/192
SYMBOL DESCRIPTION (* 44 pin LQFP)
RXA, RXB
TXA, TXB
RESET
OP0
OP1
OP2
OP3
OP4
Symbol
Rev. 1.33
35,11
33,13
44
38
32
14
31
15
30
Pin
29,5
28,6
44*
32
27
26
25
7
8
Signal
type
O
O
O
O
O
O
I
I
Serial data input. The serial information (data) received from
serial port to XR88C92/192 receive input circuit. A mark (high)
is logic one and a space (low) is logic zero.This input must
be held at logic one when idle and during power down.
Serial data output. The serial data is transmitted via this pin
with additional start , stop and parity bits. This output will be
held in mark (high) state during reset, local loop back mode
or when the transmitter is disabled.
Master Reset (active high). A high on this pin will reset all the
outputs and internal registers. The transmitter output and
the receiver input will be disabled during reset time.
Multi-purpose output. General purpose output or Channel A
Request-To-Send (-RTSA active low).
Multi-purpose output. General purpose output or Channel B
Request-To-Send (-RTSB active low).
Multi-purpose output. General purpose output or one of the
following functions can be selected for this output pin by
programming the Output Port Confiuration Register bits 1,0;
TxAClk1 -Transmit 1X clock.
TxAClk16 -Transmit 16X clock
RxAClk1 -Receive 1X clock
Multi-purpose output. General purpose output or one of the
following functions can be selected for this output pin by
programming the Output Port Confiuration Register bits 3,2;
C/T -Counter timer output (Open drain output)
TxBClk1 -Transmit 1X clock
RxBClk1 -Receive 1X clock
Multi-purpose output. General purpose output or one of the
following functions can be selected for this output pin by
programming the Output Port Confiuration Register bit 4;
-RxARDY -Receive ready signal (Open drain output)
-RxAFULL - Receive FIFO full signal (Open drain output)
4
Pin Description