UPD61P24CS NEC, UPD61P24CS Datasheet - Page 11

• Manufacturer Part Number: UPD61P24CS
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC

11.5
communication is in progress.
11.6
connected as an input to the LSB of the accumulator; the S-IN pin is pulled down to the V
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.
through current flows internally. When the RL A instruction is executed, the MSB is copied to the LSB.
By going low whenever the carrier frequency is output from the REM pin, the S-OUT pin indicates that
The S-OUT pin is CMOS output.
The S-OUT pin goes high on reset.
To input serial data, use the S-IN pin. When control register (P
If the control register is released from serial input mode, the S-IN pin goes into a high-impedance state, but no
At reset (all cleared), the S-IN pin goes into a high-impedance state.
S-OUT Pin
S-IN Pin (D
0
CY
bit of P
1
)
Figure 11-3. Configuration of the S-IN Pin
A
3
A
2
A
1
A
0
Control register
1
) is set to serial input mode, the S-IN pin is
SS
S-IN
level within the LSI.
PD61P24
11