UPD17P136ACT datasheet(29/292 Pages) NEC

29 / 292 page

CHAPTER 2 PIN FUNCTIONS

Pin No.

Pin name

Function

Output

At reset

P1B0/VPP Note1

Used as port 1B, or programming voltage supply pin in

Input

program memory write/verify mode.

• P1B0

• 1-bit input port

• A pull-up resistor can be internally connected by mask

option Note2

• VPP

• Available for the

µPD17P136A and µPD17P137A only

• Applies programming voltage (+12.5 V) at program

memory writing/verification

P1A3

Port 1A

N-ch open

Input

• 4-bit input/output port

drain

P1A0

• Input/output setting in 4-bit unit

• A pull-up resistor can be internally connected by mask

option Note2

P0D3/TM0OUT

Used as port 0D, or timer 0 carry output, serial data input,

N-ch open

Input

serial data output, and serial clock input/output pins

drain

A pull-up resistor can be internally connected by mask

option Note2

• P0D3 to P0D0

• 4-bit input/output port

• Input/output setting in 1 bit unit

• TM0OUT

• Timer 0 carry output

P0D2/SI

• SI

• Serial data input

P0D1/SO

• SO

• Serial data output

P0D0/SCK

• SCK

• Serial clock input/output

XOUT

In the case of the

µPD17135A/17137A/17P137A

—

XIN/CLK Note3

• XIN, XOUT

• Connected to a resonator for system clock oscillation

• The ceramic resonator is connected.

• CLK

• Available for the

µPD17P137A only

• Clock input pin for address updating at program

memory writing/verification

OSC0

In the case of the

µPD17134A/17136A/17P136A

OSC1/CLK Note3

• OSC0, OSC1

• Connected to a resonator for system clock oscillation

• Resistor is connected between OSC0 and OSC1.

• CLK

• Available for the

µPD17P136A only

• Clock input pin for address updating at program

memory writing/verification

VDD

Power supply

—

In the program memory write/verify mode of the

µPD17P136A/17P137A, +6 V is applied.

Notes 1.

The VPP pin is valid only with the

µPD17P136A and 17P137A.

The

µPD17P136A and 17P137A do not have a pull-up resistor connected by mask option.

The CLK pin is valid only with the

µPD17P136A and 17P137A.

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