XR16M890IL32-0C Datasheet, PDF (7/63 Pages) Exar Corporation – UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS

REV. 1.0.0
Pin Description
XR16M890
UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
NAME
INT
QFN-32 QFN-40 TQFP-48
TYPE
PIN#
PIN#
PIN#
DESCRIPTION
10
12
15
O _{Interrupt output (active high). The output state is defined by the user}
through the software setting of MCR[3]. INT is set to the active
mode when MCR[3] is set to a logic 1. INT is set to the three state
mode when MCR[3] is set to a logic 0. See MCR[3].
MODEM I/O and GPIOs
TX
17
32
RX
18
33
RTS#
19
31
CTS#
16
30
DTR#/GPIO0 24
29
DSR#/GPIO1 23
28
CD#/GPIO2 22
27
RI#/GPIO3 21
26
GPIO4
-
23
GPIO5
-
22
GPIO6
-
21
GPIO7
-
20
GPIO8
-
-
GPIO9
-
-
GPIO10
-
-
GPIO11
-
-
GPIO12
-
-
GPIO13
-
-
GPIO14
-
-
GPIO15
-
-
ANCILLARY SIGNALS
XTAL1
26
35
XTAL2
27
36
40
O _{UART Transmit Data or infrared encoder data. Standard transmit}
and receive interface is enabled when MCR[6] = 0. In this mode, the
TX signal will be a logic 1 during reset or idle (no data). Infrared
IrDA transmit and receive interface is enabled when MCR[6] = 1. In
the Infrared mode, the inactive state (no data) for the Infrared
encoder/decoder interface is a logic 0. If it is not used, leave it
unconnected.
41
I _{UART Receive Data or infrared receive data. Normal receive data}
input must idle at logic 1 condition. The infrared receiver idles at
logic 0. This input should be connected to VCC when not used.
39
O _{UART Request-to-Send (active low) or general purpose output. This}
output must be asserted prior to using Auto RTS HW flow control,
see EFR[6], MCR[1] and IER[6]. This output can also be used for
the Auto RS-485 half-duplex output control.
38
I _{UART Clear-to-Send (active low) or general purpose input. It can}
be used for auto CTS flow control, see EFR[7], MSR[4] and IER[7].
This input should be connected to VCC when not used.
37
I/O _{General purpose I/O or UART Data-Terminal-Ready (active low).}
36
I/O _{General purpose I/O or UART Data-Set-Ready (active low).}
35
I/O _{General purpose I/O or UART Carrier-Detect (active low).}
34
I/O _{General purpose I/O or UART Ring-Indicator (active low).}
28
I/O _{General purpose I/Os.}
27
I/O
26
I/O _{These GPIOs are only available on the QFN-40 and TQFP-48 pack-}
25
I/O ages.
19
I/O _{General purpose I/Os.}
20
I/O
21
I/O _{These GPIOs are only available on the TQFP-48 package.}
22
I/O
23
I/O
29
I/O
30
I/O
31
I/O
43
I _{Crystal or external clock input. Note: This input is not 5V tolerant.}
44
O _{Crystal or buffered clock output.}
7