xr16m752im48 Exar Corporation, xr16m752im48 Datasheet - Page 5

• Manufacturer Part Number: xr16m752im48
• Description: Xr68m752 -high Performance Duart With 64-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.2
Pin Description
DSRA#
DSRB#
CTSA#
DTRA#
OP2A#
RTSB#
CTSB#
DTRB#
CDA#
CDB#
N
RIA#
RIB#
TXB
RXB
AME
32-QFN
P
25
15
16
IN
6
3
-
-
-
-
-
-
-
-
-
#
48-TQFP
P
38
34
39
40
41
32
22
23
35
20
16
21
IN
8
4
#
T
YPE
O
O
O
O
O
I
I
I
I
I
I
I
I
I
UART channel A Clear-to-Send (active low) or general purpose input.
It can be used for auto CTS flow control, see EFR[7] and IER[7]. This
input should be connected to VCC or GND when not used.
UART channel A Data-Terminal-Ready (active low) or general purpose
output. If it is not used, leave it unconnected.
UART channel A Data-Set-Ready (active low) or general purpose input.
This input should be connected to VCC or GND when not used.
UART channel A Carrier-Detect (active low) or general purpose input.
This input should be connected to VCC or GND when not used.
UART channel A Ring-Indicator (active low) or general purpose input.
This input should be connected to VCC or GND when not used.
Output Port 2 Channel A - The output state is defined by the user and
through the software setting of MCR[3]. INTA is set to the active mode
and OP2A# output LOW when MCR[3] is set to a logic 1. INTA is set to
the three state mode and OP2A# output HIGH when MCR[3] is set to a
logic 0. See MCR[3]. If INTA is used, this output should not be used as
a general output else it will disturb the INTA output functionality.
UART channel B 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 HIGH 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 LOW. If it is not used, leave it unconnected.
UART channel B Receive Data or infrared receive data. Normal receive
data input must idle HIGH. The infrared receiver pulses typically idles at
logic 0 but can be inverted by software control prior going in to the
decoder, see MCR[6]. If this pin is not used, tie it to VCC or pull it high
via a 100k ohm resistor.
UART channel B Request-to-Send (active low) or general purpose out-
put. This port must be asserted prior to using auto RTS flow control,
see EFR[6] and IER[6]. For auto RS485 half-duplex direction control,
see DLD[6].
UART channel B Clear-to-Send (active low) or general purpose input.
It can be used for auto CTS flow control, see EFR[7] and IER[7]. This
input should be connected to VCC or GND when not used.
UART channel B Data-Terminal-Ready (active low) or general purpose
output. If it is not used, leave it unconnected.
UART channel B Data-Set-Ready (active low) or general purpose input.
This input should be connected to VCC or GND when not used.
UART channel B Carrier-Detect (active low) or general purpose input.
This input should be connected to VCC or GND when not used.
UART channel B Ring-Indicator (active low) or general purpose input.
This input should be connected to VCC or GND when not used.
5
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
D
ESCRIPTION
XR16M752/XR68M752