XR17D154IV-F Exar Corporation, XR17D154IV-F Datasheet - Page 34

• Manufacturer Part Number: XR17D154IV-F
• Description: IC UART PCI BUS QUAD 144LQFP
• Manufacturer: Exar Corporation
• Type: IrDA or RS- 485r

Specifications of XR17D154IV-F

• Number Of Channels: 4, QUART
• Package / Case: 144-LQFP
• Features: *
• Fifo's: 64 Byte
• Protocol: RS485
• Voltage - Supply: 3.3V, 5V
• With Auto Flow Control: Yes
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• Mounting Type: Surface Mount
• Data Rate: 6.25 Mbps
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3 V
• Supply Current: 4 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V or 5 V
• No. Of Channels: 4
• Uart Features: Tx/Rx FIFO Counters
• Supply Voltage Range: 3V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LQFP
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 1016-1290

XR17D154
UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART
Each UART channel provides an internal loopback capability for system diagnostic. The internal loopback
mode is enabled by setting MCR register bit-4 to logic 1. All regular UART functions operate normally.
Figure 18
output is internally routed to the receive shift register input allowing the system to receive the same data that it
was sending. The TX, RTS# and DTR# pins are held HIGH (idle or de-asserted state), and the CTS#, DSR#
CD# and RI# inputs are ignored.
The 4 sets of UART configuration registers are decoded using address lines A9 to A11 as shown below:
5.6
5.7
Internal Loopback
UART CHANNEL CONFIGURATION REGISTERS AND ADDRESS DECODING
shows how the modem port signals are re-configured. Transmit data from the transmit shift register
F
IGURE
18. I
NTERNAL
L
OOP
A11
0
0
0
0
B
ACK
Transmit Shif t
Receive Shif t
A10
Register
Register
0
0
1
1
A9
34
RTS#
CTS#
DTR#
DSR#
0
1
0
1
CD#
RI#
MC R bit-4=1
UART C
OP1#
OP2#
S
VCC
VCC
ELECTION
VCC
0
1
2
3
HANNEL
RX [3:0]
RTS# [3:0]
CTS# [3:0]
TX [3:0]
DSR# [3:0]
DTR# [3:0]
RI# [3:0]
CD# [3:0]
xr
REV. 1.2.2