xr82c684 Exar Corporation, xr82c684 Datasheet - Page 18

• Manufacturer Part Number: xr82c684
• Description: Cmos Quad Channel Uart Quart
• Manufacturer: Exar Corporation

Table 1
the suffix “n” is used at the end of many of the QUART
registers symbols in order to refer, generically, to any one
of the four channels
XR82C684
Bit 7
Bit 7
Bit 6
Miscellaneous Commands
Bit 6
Bit 5
Bit 4
Bit 5
Null Command:
Reset MRn Pointer:
Reset Receiver:
Reset Transmitter:
Reset Error Status:
Reset Break Change Interrupt:
Please note that
CRA, CRB, CRC, CRD
Bit 4
Table 2
B.2 Command Decoding
commands 116 through B effects only the performance of
Command Register’s Channel. However, commands C
and D effects system (or chip) level operation.
Enable/Disable Receiver
Bit 3
Description
Bit 2
Please note that the upper nibble
Enable/Disable Transmitter
Bit 1
Section G.3
Bit 0