XR68C681CJ-F Exar Corporation, XR68C681CJ-F Datasheet - Page 38

• Manufacturer Part Number: XR68C681CJ-F
• Description: IC UART CMOS DUAL 44PLCC
• Manufacturer: Exar Corporation
• Type: CMOS Dual Channel UARTr

Specifications of XR68C681CJ-F

• Number Of Channels: 2, DUART
• Package / Case: 44-LCC (J-Lead)
• Features: *
• Fifo's: 1 Byte, 3 Byte
• Voltage - Supply: 5V
• Mounting Type: Surface Mount
• Data Rate: 1 Mbps
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Supply Current: 15 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 5 V
• Propagation Delay Time Ns: 400 ns
• No. Of Channels: 2
• Supply Voltage Range: 4.75V To 5.25V
• Operating Temperature Range: 0°C To +70°C
• Digital Ic Case Style: PLCC
• No. Of Pins: 44
• Filter Terminals: SMD
• 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: 1016-1323-5

Bits 7 - 4: “Change in Logic State” Identification Bits
Bits 3 - 0: “The Current State of Input Pins IP0 - IP3”


Note:
user. Setting or clearing the bits in ACR[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 IMR[7] allows the user to “globally” enable or disable this
interrupt.
XR68C681
This “two-tiered” interrupt enabling/disabling approach, for the “Input Change of State” interrupt allows tremendous flexibility for the
BRG Set
Select
Bit 7



Bit 6
Counter/Timer Mode and Source
Bit 5
Table 7
Table 14. ACR- Auxiliary Control Register
Bit 4
Delta IP3
Interrupt
Bit3
Delta IP2
Interrupt
Bit 2
Delta IP1
Interrupt
Bit 1
Delta IP0
Interrupt
Bit 0