XR17C158CV-F Exar Corporation, XR17C158CV-F Datasheet - Page 18

• Manufacturer Part Number: XR17C158CV-F
• Description: IC UART PCI BUS 5V OCTAL 144LQFP
• Manufacturer: Exar Corporation
• Type: Universal PCI Bus Octal UARTr

Specifications of XR17C158CV-F

• Number Of Channels: 8
• Package / Case: 144-LQFP
• Features: *
• Fifo's: 64 Byte
• Protocol: RS485
• Voltage - Supply: 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): 7 V
• Supply Current: 5 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 7 V
• No. Of Channels: 8
• Uart Features: High Performance, Read/Write Burst Operation
• Supply Voltage Range: -0.5V To 7V
• Operating Temperature Range: 0°C To +70°C
• 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: 1016-1287

XR17C158
5V PCI BUS OCTAL UART
TIMERMSB [31:24] and TIMERLSB [23:16]
TIMERMSB and TIMERLSB form a 16-bit value. The least-significant bit of the timer is 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 and logic 1 selects 8X sampling rate. Transmit and receive data rates will double by
selecting 8X sampling rate.
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
bit-7=1 resets channel 7.
1.2.3
1.2.4
1.2.5
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
Ch-7
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
16-Bit Timer/Counter Programmable Registers
Ch-7
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Individual UART Channel 8X Clock Mode Enable
Ch-6
Individual UART Channel Reset Enable
Ch-6
Bit-9 Bit-8
Ch-5 Ch-4 Ch-3 Ch-2 Ch-1 Ch-0
Ch-5 Ch-4 Ch-3 Ch-2 Ch-1 Ch-0
8XMODE Register
RESET Register
Table 19
18
Bit-7
for details. Bit-0 =1 resets UART channel 0 while
Bit-6
Bit-5
TIMERLSB Register
Bit-4
Bit-3
Bit-2
xr
Bit-1 Bit-0
REV. 1.4.3