UPD61P24CS データシートの表示（PDF） - NEC => Renesas Technology

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UPD61P24CS

4-BIT SINGLE-CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION

NEC => Renesas Technology 

µPD61P24

11.5 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 CMOS output.

The S-OUT pin goes high on reset.

11.6 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 is pulled down to the VSS level 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.

At reset (all cleared), the S-IN pin goes into a high-impedance state.

Figure 11-3. Configuration of the S-IN Pin

CY

A3

A2

A1

A0

S-IN

Control register

11

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