XR17D154IV-F Exar Corporation, XR17D154IV-F Datasheet - Page 18

• 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
TIMER [15:8] - Reserved
TIMERMSB [31:24] and TIMERLSB [23:16]
TIMERMSB and TIMERLSB form a 16-bit value. The least-significant bit of the timer is being bit [0] of the
TIMERLSB with most-significant-bit being bit [7] in TIMERMSB. Notice that these registers do not hold the
current counter value when read. Reading the TIMERCNTL register will clear its interrupt. Default value is
zero (timer disabled) upon powerup and reset.
Each bit selects 8X or 16X sampling rate for that UART channel, bit-0 is channel 0. Logic 0 (default) selects
normal 16X sampling with logic one selects 8X sampling rate. Transmit and receive data rates will double by
selecting 8X.
The 8-bit Reset register [RESET] provides the software with the ability to reset the UART(s) when there is a
need. Each bit is self-resetting after it is written a logic 1 to perform a reset to that channel. All registers in that
channel will be reset to the default condition, see
3=1 resets channel 3..
2.2.3
2.2.4
2.2.5
Bit-15 Bit-14 Bit-13 Bit-12 Bit-11 Bit-10
8XMODE [7:0] - (default 0x00)
REGA [15:8] Reserved
RESET [23:16] - (default 0x00)
TIMERMSB Register
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2
Rsvd
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Rsvd
Rsvd
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Individual UART Channel 8X Clock Mode Enable
16-Bit Timer/Counter Programmable Registers
Rsvd
Individual UART Channel Reset Enable
Rsvd
Rsvd
Rsvd
Bit-9 Bit-8
TIMERCNTL Register
Rsvd Rsvd Ch-3 Ch-2 Ch-1 Ch-0
Rsvd Rsvd Ch-3 Ch-2 Ch-1 Ch-0
8XMODE Register
RESET Register
MPIO[0]
Control
Table 20
18
Select
Clock
Bit-7
for details. Bit-0 =1 resets UART channel 0 with bit-
Re-trigger
Single/
Bit-6
Bit-1 Bit-0
Start/
Stop
Bit-5
TIMERLSB Register
Enable
INT
Bit-4
Bit-3
Bit-2
xr
Bit-1 Bit-0
REV. 1.2.2