UPD6125A Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD6125A

4-BIT SINGLE CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION

NEC => Renesas Technology 

µPD6125A, 6126A

11.7 S-OUT Pin

By going low whenever the carrier frequency is output from the REM pin, the S-OUT pin indicates that

communication is in progress.

The S-OUT pin is a CMOS output pin.

The S-OUT pin goes high on reset.

11.8 S-IN Pin (D0 Bit of P1)

To input serial data, use the S-IN pin. When control register (P1) is set to serial input mode, the S-IN pin is connected

as an input to the LSB of the accumulator. The S-IN pin can be pulled down to the VSS level by a mask option from

within the LSI. In this state, if the rotate-left accumulator instruction (RL A) is executed, the data on the S-IN pin is

copied to the LSB of the accumulator.

If the control register is released from serial input mode, the S-IN pin goes into a high-impedance state, but no

through current flows internally.

When the RL A instruction is executed, the MSB is copied to the LSB.

When “all clear” is input or on reset, the S-IN pin goes into a high-impedance state.

Figure 11-4. The S-IN Pin Organization

CY

A3

A2

A1

A0

Control

register

S-IN

12

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