STMPE2401 datasheet(42/55 Pages) STMICROELECTRONICS

42 / 55 page

Keypad controller

STMPE2401

42/55

13.2

KPC_col register

13.3

KPC_row_msb register

Table 38. KPC_col Register

Bit

210

Name

Input Column 0 ~ 7

Read/Write

WWWW

Reset Value

000

Bit

Name

Description

Input Column 7

‘1’ to turn on scanning of column 7; ‘0’ to turn off

Input Column 6

‘1’ to turn on scanning of column 6; ‘0’ to turn off

Input Column 5

‘1’ to turn on scanning of column 5; ‘0’ to turn off

Input Column 4

‘1’ to turn on scanning of column 4; ‘0’ to turn off

Input Column 3

‘1’ to turn on scanning of column 3; ‘0’ to turn off

Input Column 2

‘1’ to turn on scanning of column 2; ‘0’ to turn off

Input Column 1

‘1’ to turn on scanning of column 1; ‘0’ to turn off

Input Column 0

‘1’ to turn on scanning of column 0; ‘0’ to turn off

Table 39. KPC_row_msb register

Bit

Name

ScanPW1

ScanPW0

Output Row 8 ~ 11

Read/Write

Reset Value

Bit

Name

Description

ScanPW1

Pulse width setting of keypad scanning. Use “11” at all

times

ScanPW0

Output Row 11

‘1’ to turn on scanning of row 11; ‘0’ to turn off

Output Row 10

‘1’ to turn on scanning of row 10; ‘0’ to turn off

Output Row 9

‘1’ to turn on scanning of row 9; ‘0’ to turn off

Output Row 8

‘1’ to turn on scanning of row 8; ‘0’ to turn off

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