UPD161622 datasheet(83/103 Pages) NEC

83 / 103 page

Data Sheet S15649EJ2V0DS

µ PD161622

(3/9)

Resistor

Bit

Symbol

Function

BMD

Sets the bus width when the parallel interface is used.

0: 16-bit data bus

1: 8-bit data bus

This command is invalid when the serial interface is used.

BSTR

Sets the write mode for writing data to the display RAM.

If the high-speed RAM write mode is selected, data is written to the display RAM in 64-bit units

inside the

µ PD161622. When selecting the high-speed RAM write mode, be sure to write data

to the display RAM in 64-bit units.

0: Normal write mode (16-bit access)

1: High-speed RAM write mode (64-bit access)

WAS

Window access mode setting

When the window access mode is set, the address is incremented/decremented only in the

range set by the MIN

⋅X address setting register (R8), MAX. ⋅X address setting register (R9),

MIN

⋅Y address setting register (R10), and MAX. ⋅Y address setting register (R11).

0: Normal operation

1: Window access mode

INC

Selects the direction in which the display RAM address is to be incremented/decremented.

Whether the X address and Y address are incremented or decremented is specified by XDIR

(R5: D1) and YDIR (R5: D0), respectively.

0: Access in X address direction

1: Access in Y address direction

XDIR

Specifies whether the display RAM address is incremented or decremented in the X address

direction.

0: Increments X address

1: Decrements X address

YDIR

Specifies whether the display RAM address is incremented or decremented in the Y address

direction.

0: X address increment

1: X address decrement

D7 to D0

XAn

This register sets the X address of the display RAM.

Set a value between 00H and 83H.

D7 to D0

YAn

This register sets the Y address of the display RAM.

Set a value between 00H and AFH.

D7 to D0

XMINn

Sets the minimum value of the X address in the window access mode.

The X address is incremented up to the maximum value set by the MAX

⋅X address register

(R9), and then initialized to the address value set by this command. (R5: XDIR = 0)

Set a value between 00H to 82H.

D7 to D0

XMAXn

Sets the maximum value of the X address in the window access mode.

The X address is incremented up to the maximum value set by the MIN

⋅X address register

(R8), and then initialized to the address value set by this command. (R5: XDIR = 0)

Set a value between 01H to 83H.

R10

D7 to D0

YMINn

Sets the minimum value of the T address in the window access mode.

The Y address is incremented up to the maximum value set by the MAX

⋅Y address register

(R11), and then initialized to the address value set by this command.

(R5: YDIR = 0)

Set a value between 00H to AEH.

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