xr82c684 Exar Corporation, xr82c684 Datasheet - Page 71

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



Note:
approach, for the “Input Change of State” interrupt allows
tremendous flexibility for the user. Setting or clearing the
bits in ACR1[3:0] and/or ACR2[3:0] allows the user to
specify exactly which Input Port pins to be enabled (or
disabled) for generating the “Input Port Change of State”
interrupt. Setting or clearing IMR1[7] and/or IMR2[7]
allows the user to “globally” enable or disable this
interrupt.

Bit 7
Bit 7
Bit 7
This “two-tiered” interrupt enabling/disabling
Bit 6
Bit 6
Bit 6
Please note that the applicable bits, within each of the ACR registers, are shaded.
Table 19. Input Port Configuration Register 2 - IPCR2
Table 21. ACR2 - Auxiliary Control Register 2
Bit 5
Bit 5
Table 20. ACR1- Auxiliary Control Register 1
Bit 5
Table 4
Table 4
Bit 4
Bit 4
Bit 4

E.3 44 Pin PLCC Packaged QUARTs
F. OUTPUT PORT
Bit 3
Bit 3
Bit 3
Bit 2
Bit 2
Bit 2
XR82C684
Bit 1
Bit 1
Bit 1
Bit 0
Bit 0
Bit 0