xr68c92 Exar Corporation, xr68c92 Datasheet - Page 5

• Manufacturer Part Number: xr68c92
• Description: Xr68c92 -dual Uart With Eight Bytes Transmit And Receive Fifo
• Manufacturer: Exar Corporation

SYMBOL DESCRIPTION (* 44 pin LQFP)
XTAL2
RXA, RXB
TXA, TXB
IP0
IP1
IP2
IP3
IP4
IP5
OP0
OP1
OP2
Symbol
Rev. 1.33
35,11
33,13
44
37
40
43
42
32
14
31
8
5
3
30,11
31,10
Pin
40
36
39
38
29
12
28
33
7
4
2
29,5
28,6
44*
31
43
34
41
37
36
27
26
2
7
Signal
type
O
O
O
O
O
I
I
I
I
I
I
I
Crystal input 2 or buffered clock output. See XTAL1.
Serial data input. The serial information (data) received from
serial port to XR68C92/192 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.
Multi-purpose input or Channel A Clear-To-Send (-CTSA
active low). If not used, this pin should be tied to VCC.
Multi-purpose input or Channel B Clear-To-Send (-CTSB
active low). If not used, this pin should be tied to VCC.
Multi-purpose input or Channel B receive external clock
input (received data is sampled on the rising edge of the
clock) or Timer/Counter External clock input. If not used, this
pin should be tied to VCC or GND.
Multi-purpose input or Channel A transmit external clock
input. The transmit data is clocked on the falling edge of the
clock. If not used, this pin should be tied to VCC or GND.
Multi-purpose input or Channel A receive external clock
input. The received data is clocked on the rising edge of the
clock. If not used, this pin should be tied to VCC or GND.
Multi-purpose input or Channel B transmit external clock
input. The transmit data is clocked on the falling edge of the
clock. If not used, this pin should be tied to VCC or GND.
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
5
Pin Description
XR68C92/192