STMPE2403 datasheet(39/63 Pages) STMICROELECTRONICS

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STMPE2403

GPIO controller

39/63

10.5

STMPE2401 Pin Compatibility Register (COMPAT2401)

STMPE2403 is an enhanced version of the other port expander device, STMPE2401.

However, the pin configuration of STMPE2403 is different from that of STMPE2401. For

backward pin compatibility to STMPE2401, COMPAT2401 register provides a control bit that

allows STMPEE2403 to have the same pin configuration as in STMPE2401.

The pin locations for the following eight IO ports are different from those shown in section

1.3: KP_X0, KP_X1, KP_X2, KP_X3, KP_Y4, KP_Y5, KP_Y6 and KP_Y7. When ‘PIN2401’

bit is set to ‘1’, the eight IO ports are assigned to the pin locations as defined by the following

diagram.

COMPAT2401

Bit

543

210

RESERVED

PIN2401

R/W

RRR

Reset

Value

000

Table 37. Bit description

Bits

Name

Description

PIN240

This control bit selects pin configuration to be used.

‘0’ – STMPE2401 pin configuration as defined in sections 1.1 and 1.3.

‘1’ – Pin configuration compatible to STMPE2401.

Table 38. Pin location

KP_X2

KP_X1

RESET

XTALOUT

SCLK

KP_Y6

KP_X4

KP_X3

KP_X0

XTALIN

SDATA

KP_Y7

KP_X6

KP_X5

GND1

GND2

KP_Y8

INT

VCC1

KP_X7

GND3

GND4

PWM-1

VCC2

KP_Y5

KP_Y3

KP_Y1

KP_Y9

PWM-3

PWM-2

KP_Y4

KP_Y2

KP_Y0

ADDR0

KP_Y10

KP_Y11

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