XR82C684J/44-F Exar Corporation, XR82C684J/44-F Datasheet - Page 63

• Manufacturer Part Number: XR82C684J/44-F
• Description: Quad Channel UART
• Manufacturer: Exar Corporation

Specifications of XR82C684J/44-F

• Features: *
• Number Of Channels: 4, QUART
• Fifo's: 3 Byte
• Voltage - Supply: 5V
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant



Note:
Table 15A
Actual baud Rate =
Actual baud Rate =
Table 2
If the user programs either nibble of the Clock
Select Register (CSRn[7:4] or CSRn[3:0]) with
values ranging from 0
using the BRG as a source for timing. How-
ever, these standard bit rates (presented in
Table 15) apply only if the X1/CLK pin is driven
with a 3.6864 MHz signal. If a signal with a
different frequency (fo) is applied to the X1/CLK
pin, then the QUART channel is running at the
following baud rate:
Register
Table 15
Table 15
Table
Table
Table 16. Command Register Controls Over the Extend Bit
A Baud Rate Value
Baud Rate Value
Table 15
Table 15A
16
Table 15A
to C
MHz
MHz
16
, then the user is
Contents
Table 15A
fo
fo
X - The Select Extend bit
Table 16
1X vs 16X Clock Signals
Figure 33
Resulting Action
XR82C684
Table 2