UPD161622 datasheet(9/103 Pages) NEC

9 / 103 page

Data Sheet S15649EJ2V0DS

µ PD161622

(2/2)

Symbol

Pin Name

Pad No.

I/O

Function

D0 to D5,

D8 to D15,

D6 (SCL),

D7 (SI)

Data bus

(serial clock)

(serial data input)

50 to 35

I/O

These pins comprise 16-bit bi-directional data.

When the serial interface has been selected (PSX = L), D7 functions as

a serial data input pin (SI), D6 functions as a serial clock input pin (SCL).

In either case, pins D0 to D7 and D8 to D15 are in high impedance mode.

When the chip is not selected, D0 to D15 are in high impedance mode.

Index register/,

data/command selection

Input

When parallel data transfer has been selected, this pin is usually

connected to the least significant bit of the standard CPU address bus

and is used to distinguish between data from index registers and

data/commands.

RS = H: Indicates that data from D0 to D15 is data/command

RS = L: Indicates that data from D0 to D7 is index register contents

Also, when serial data transfer is selected, the level of the RS pin is

fetched at the rising edge of the eighth clock of the serial clock and

whether the data is index register contents or data/command is

distinguished.

RS = H: Indicates that the data input to SI is data/command.

RS = L: Indicates that the data input to SI is index register contents.

IP0 to IP3

Input port

125, 127,

129, 131

Input

This is a general-purpose input port.

The status of these pins (H or L)

can be read via a command.

Because this is a CMOS input, do not leave open.

OP0 to

OP7

Output port

116 to 123

Output

This is a general-purpose output port.

The status of these pins (H or L)

can be write via a command.

Leave open when in unused.

RSEL

Oscillation signal select

Input

This pin is for oscillation signal selection. When in used external

resistance connection oscillator circuit, this pin set H. When in used

internal oscillator circuit, this pin set L.

RSEL = H: External resistance connection oscillator circuit select

RSEL = L: CR internal oscillator circuit select

OSCIN

Oscillation signal

Input

This pin is for oscillation signal input.

RSEL = H: Connect 51 k

Ω resistance between OSCIN and OSCOUT.

RSEL = L: Leave open

OSCOUT

Oscillation signal

Output

This pin is for oscillation signal input.

RSEL = H: Connect 51 k

Ω resistance between OSCIN and OSCOUT.

RSEL = L: Leave open

CSTB

GSTB logic signal

Output

This pin outputs STB signal for gate driver leveled by interface power

supply voltage (VCC2). This output signal is reverse signal of GSTB.

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