|
Details, datasheet, quote on part number:XR88C92
| |
Datasheet text preview:
Preliminary Information DUAL UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER
XR88C92/192
DESCRIPTION
The XR88C92/192 is a Dual Universal Asynchronous Receiver and Transmitter with 8 (XR88C92) / 16 (XR88C192) bytes transmit and receive FIFO. The XR88C92/192 is a pin and functional replacement for the SC26C92 and an improved version of the Philips SCC2692 UART with additional features. The operating speed of the receiver and transmitter can be selected independently from a table of twenty four 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 XR88C92/192 provides a powerdown mode in which the oscillator is stopped but the register contents are retained. The XR88C92/192 is fabricated in an advanced CMOS process to achieve low power and high speed requirements.
FEATURES
· Pin to pin and functional compatible to SC26C92 and SCC2692 · Full duplex asynchronous transmit receive operation · 8 Bytes transmit/receive FIFO (XR88C92) · 16 Bytes transmit/receive FIFO (XR88C192) · Programmable character lengths (5, 6, 7, 8) · Parity, framing, and over run error detection · Programmable 16-bit timer/counter · On-chip crystal oscillator · Single interrupt output with eight selectable interrupting conditions · External 1X or 16X clock · Data rate up to 1Mbps · Fixed baud rates from 50Bps to 230.4kbps · 7 General purpose inputs · 8 General purpose outputs · TTL compatible inputs, outputs · 4 Transmit/receive trigger levels · Watch dog timer · Multidrop mode operation · 3.3 or 5 volts operation · Loopback modes · Power down mode
IP1 A2
PLCC Package
VCC N.C. IP3 IP4 IP5 IP6 41 IP2 40 39 38 37 36 35 A1 A0
44
43
42
6
5
4
3
2
1
A3 IP0 -IOW -IOR RXB N.C. TXB OP1 OP3 OP5 OP7
7 8 9 10 11 12 13 14 15 16 17 D1 18 D3 19 D5 20 D7 21 22 23 -INT 24 D6 25 D4 26 D2 27 D0 28
-CS RESET XTAL2 XTAL1 RXA N.C. TXA OP0 OP2 OP4 OP6
XR 88C 9 2 X R 8 8 C 1 92
34 33 32 31 30 29
GND
Part number
Pins Package
N.C.
Operating temperature
ORDERING INFORMATION
Part number Pins Package Operating temperature
XR88C92CP XR88C92CJ XR88C92CV
40 44 44
PDIP PLCC TQFP
0° C to + 70° C 0° C to + 70° C 0° C to + 70° C
XR88C92IP XR88C92IJ XR88C92IV XR88C192CP XR88C192CJ XR88C192CV XR88C192IP XR88C192IJ XR88C192IV
40 44 44 40 44 44 40 44 44
PDIP PLCC TQFP PDIP PLCC TQFP PDIP PLCC TQFP
-40° C -40° C -40° C 0° C 0° C 0° C -40° C -40° C -40° C
to + 85° C to + 85° C to + 85° C to + 70° C to + 70° C to + 70° C to + 85° C to + 85° C to + 85° C
Rev. P1.00
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 · (510) 668-7000 · FAX (510) 668-7017
XR88C92/192
Package Description
40 Pin DIP Package
44 Pin TQFP Package
VCC
VCC
IP1
IP3
IP4
IP5
IP6 35
A0 IP3 A1 IP1 A2 A3 IP0 -IOW -IOR RXB TXB OP1 OP3 OP5 OP7 D1 D3 D5 D7 GND
1 2 3 4 5 6 7 8
40 39 38 37 36 35 34 33
VCC IP4 IP5 IP6 IP2 -CS RESET
RXB 5 6 7 8 9 10 11 A3 IP0 -IOW -IOR 1 2 3 4
44
43
42
41
40
39
38
37
36
34
IP2
A2
A1
A0
33 32 31 30 29
-CS RESET XTAL2 XTAL1 RXA TXA OP0 OP2 OP4 OP6 N.C.
XTAL2
TXB
XR88C92 XR88C192
9 10 11 12 13 14 15 16 17 18 19 20
32 31 30 29 28 27 26 25 24 23 22 21
XTAL1 RXA TXA OP0 OP2 OP4
XR88C92 XR88C192
28 27 26 25 24 23
OP1 OP3 OP5 OP7 N.C.
12
13
14
15
16
17
18
19
20
21 D2
OP6
GND GND D6 D4 D1 D3 D5 D7
D0 D2 D4 D6 -INT
Rev. P1.00
2
-INT
D0
22
XR88C92/192
Block Diagram
D0-D7 -IOR -IOW RESET
Data bus & Control Logic
Transmit FIFO Registers
Transmit Shift Register
TX A/B
Flow Control Logic Receive FIFO Registers Receive Shift Register
Register Select Logic
A0-A3 -CS
Inter Connect Bus Lines & Control signals
RX A/B
-INT -RXARDY -RXBRDY -TXARDY -TXBRDY
Interrupt Control Logic
Flow Control Logic
OP0-OP7 I/O Control Logic
XTAL1 XTAL2
Clock & Baud Rate Generator
IP0-IP6
Rev. P1.00
3
|
|
