xr16c2850im Exar Corporation, xr16c2850im Datasheet - Page 6

• Manufacturer Part Number: xr16c2850im
• Description: Dual Uart With Tx And Rx Fifo Counters, 128 Bytes Of Fifos And Automatic Rs-485 Half Duplex Control
• Manufacturer: Exar Corporation

XR16C2850
2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS
Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
CLK8/16
CLKSEL
RESET
N
GND
VCC
N.C.
AME
44-PLCC
P
none
39
44
22
IN
-
-
#
48-TQFP
P
25
24
36
42
17
12
IN
#
T
Pwr
Pwr
YPE
I
I
I
Clock Pre-scaler select. Connect to VCC for divide by 1 and GND for
divide by 4. MCR[7] can override the state of this pin following reset or
initialization. See
Transmit/Receive data sampling rate. Connect to VCC for normal 16X
sampling clock (standard baud rates) or GND for 8X sampling clock to
double the standard baud rates.
Reset (active high) - A longer than 40 ns HIGH pulse on this pin will
reset the internal registers and all outputs. The UART transmitter output
will be held at logic 1, the receiver input will be ignored and outputs are
reset during reset period (see
2.97V to 5.5V power supply. All inputs are 5V tolerant for devices with
top mark date code of "F2 YYWW" and newer.
Power supply common, ground.
No Connection.
6
Figure 6
and MCR[7].
D
ESCRIPTION
Table
16).
xr
REV. 2.1.3