STMPE1801 datasheet(42/60 Pages) STMICROELECTRONICS

No. de pieza	STMPE1801

Descripción Electrónicos	Xpander Logic™ 18-bit enhanced port expander with keypad controller

PDF	60 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

Logo

42 / 60 page

Keypad controller

STMPE1801

42/60

Doc ID 17884 Rev 3

KPC_COL_LOW

Keypad controller column (LOW)

Address:

Type:

R/W

Reset:

0x00

Description:

Keypad column scanning register.

KPC_CTRL_LOW

Keypad controller control (Low)

Address:

Type:

R/W

Reset:

0x00

Description:

Keypad control register.

Output Column 0 - 7

[7:0] OUTPUT COLUMN 0-7:

‘1’: Turn on scanning of the corresponding column.

‘0’: Turn off

SCAN_COUNT 0 – 3

DKEY 0 – 3

[7:4] SCAN_COUNT_0-3:

Number of key scanning cycles elapsed before a confirmed key data is updated into output

data FIFO (0-15 cycles)

[3] DKEY_3: Set ‘1’ to use input row 3 as dedicated key

[2] DKEY_2: Set ‘1’ to use input row 2 as dedicated key

[1] DKEY_1: Set ‘1’ to use input row 1 as dedicated key

[0] DKEY_0: Set ‘1’ to use input row 0 as dedicated key

STMPE1801 Datasheet(PDF) 42 Page - STMicroelectronics