XR88C681
FEATURES
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GENERAL DESCRIPTION
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ORDERING INFORMATION
Part No.
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Operating
Temperature Range
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XR88C681
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Figure 1. Block Diagram of the XR88C681
XR88C681
PIN CONFIGURATION
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XR88C681
PIN DESCRIPTION
44 PLCC/
LCC
40 DIP,
CDP
28 DIP,
CDIP
Symbol
7
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Type
Description
No Connection.
LSB of Address Input.
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Input Port 3.
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Address Input.
Input Port 1.
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Address Input.
MSB of Address Input.
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Input 0.
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Write Strobe (Active-Low).
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Read Strobe (Active Low).
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Receive Serial Data Input (Channel B).
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No Connect.
Transmitter Serial Data Output (Channel B).
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XR88C681
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Type
Description
Output 1 (General Purpose Output).
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Output 3 (General Purpose Output).
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Output 5 (General Purpose Output Pin).
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Output 7. (General Purpose Output Pin).
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Bi-Directional Data Bus.
Bi-Directional Data Bus.
Bi-Directional Data Bus.
MSB of the Eight Bit Bi-Directional Data Bus.
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Interrupt Request Output (Active Low, Open Drain).
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Bi-Directional Data Bus.
Bi-Directional Data Bus.
Bi-Directional Data Bus.
LSB of the Eight Bit Bi-Directional Data Bus.
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Output 6 (General Purpose Output).
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