Agilent Technologies 35670A Service Manual page 363

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Agilent 35670A

Serial Clock — This is the serial clock for the keyboard IIC bus. The IIC controller on the

A7 CPU assembly generates this clock to synchronize the transfer of data from the

A11 Keyboard Controller assembly.

Serial Data — This is the keyboard IIC bus. When a key is pressed or the RPG is turned,

SINTFPn interrupts the A7 CPU assembly and this line transmits data to the A7 CPU assembly

in 8-bit frames.

Serial Interrupt from the Front Panel — A high-to-low transition on this line interrupts the

A7 CPU assembly. This line goes low when a key is pressed or when the RPG is turned.

Voltages and Signals

A11 Keyboard Controller

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