DUAL UNIVERSAL ASYNCHRONOUS
RECEIVER AND TRANSMITTER
August 2005
XR68C92/192
DESCRIPTION
The XR68C92/192 is a Dual Universal Asynchronous Receiver and Transmitter with 8 (XR68C92) / 16 (XR68C192)
bytes transmit and receive FIFO. The XR68C92/192 is a pin-to-pin compatible and an improved version of the
XR68C681 and the Philips SCC68692 UART with faster data access and other additional features. The operating
speed of the receiver and transmitter can be selected independently from a table of eighteen fixed baud rates, a
16X clock derived from a programmable counter/timer, or an external 1X or 16X clock. The baud rate generator
and counter/timer can operate directly from a crystal or from external clock input. The XR68C92/192 provides a
power-down mode in which the oscillator is stopped but the register contents are retained. The XR68C92/192 is
fabricated in an advanced CMOS process to achieve low power and high speed requirements.
FEATURES
Added features in devices with top marking of "D2" and
newer:
•
5 volt tolerant inputs
•
Pin to pin compatible and improved version of the
SCC68692 and XR68C681
•
Enhanced Multidrop mode operation with separate
storage for address and data tags (9th bit)
•
8 Bytes transmit/receive FIFO (XR68C92)
•16
Bytes transmit/receive FIFO (XR68C192)
•
Standard baud rates from 50bps to 230.4kbps
•
Non-standard baud rate of up to 1Mbps
•
Transmit and Receive trigger levels
•
Watch dog timer
•
Programmable clock source for receiver and trans-
mitter of each channel
•
Single interrupt output
•
7 Multipurpose inputs, 8 Multipurpose outputs
•
2.97 to 5.5 volt operation
•
Programmable character lengths (5, 6, 7, 8)
•
Parity, framing, and over run error detection
•
Programmable 16-bit timer/counter
•
On-chip crystal oscillator
•
Power down mode
PLCC Package
41 -IACK
VCC
N.C.
IP1
IP3
IP4
IP5
IP2
40
39 -CS
38 -RESET
37
36
35
XTAL2
XTAL1
RXA
N.C.
TXA
OP0
OP2
OP4
OP6
34
33
32
31
30
29
D1 18
D3 19
D5 20
D7 21
GND 22
N.C. 23
-INT 24
D6 25
D4 26
D2 27
D0 28
A2
A1
A0
44
43
A3
IP0
R/-W
7
8
9
-DTACK 10
RXB
N.C.
TXB
OP1
OP3
OP5
OP7
11
12
13
14
15
16
17
XR68C92
XR68C192
ORDERING INFORMATION
Part number
Package
Operating temperature Device Status
XR68C92CP
XR68C92CJ
XR68C92CV
XR68C92IP
XR68C92IJ
XR68C92IV
XR68C192CJ
XR68C192CV
XR68C192IJ
XR68C192IV
40-Lead
44-Lead
44-Lead
40-Lead
44-Lead
44-Lead
44-Lead
44-Lead
44-Lead
44-Lead
PDIP
PLCC
LQFP
PDIP
PLCC
LQFP
PLCC
LQFP
PLCC
LQFP
0° C to + 70° C
0° C to + 70° C
0° C to + 70° C
-40° C to + 85° C
-40° C to + 85° C
-40° C to + 85° C
0° C to + 70° C
0° C to + 70° C
-40° C to + 85° C
-40° C to + 85° C
Active. See the XR68C92CV for new designs.
Active
Active
Active. See the XR68C92IV for new designs.
Active
Active
Active
Active
Active
Active
Rev. 1.33
EXAR
Corporation, 48720 Kato Road, Fremont, CA 94538
•
(510) 668-7000
•
FAX (510) 668-7017
42
6
5
4
3
2
1
EXAR [ EXAR CORPORATION ]
