XR68C92_05 Datasheet, PDF (6/33 Pages) Exar Corporation – DUAL UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER

XR68C92/192
SYMBOL DESCRIPTION (* 44 pin LQFP)
Symbol
OP3
OP4
OP5
OP6
OP7
GND
VCC
N.C.
Pin
Signal
44 40 44* type
Pin Description
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
15 13
8
O 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
30
27
25
O 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)
16 14
9
O 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 5;
-RxBRDY - Receive ready signal (Open drain output)
-RxBFULL - Receive FIFO full signal (Open drain output)
29
26
24
O Multi-purpose output. General purpose output or Transmit A
holding register empty interrupt (-TxARDY Open drain out-
put).
17
15
10
O Multi-purpose output. General purpose output or Transmit B
holding register empty interrupt (-TxBRDY Open drain out-
put)
22 20 16,17 Pwr Signal and power ground.
44 40 38,39 Pwr Power supply input, 2.97V to 5.5V.
1,12 - 11,23
23,34
No Connection.
Rev. 1.33
6