Nxp Semiconductors UM10237 ユーザーズマニュアル

UM10237_2

User manual

Rev. 02 — 19 December 2008

187 of 792

NXP Semiconductors

UM10237

Chapter 9: LPC24XX Pin connect

5.10 Pin Function Select Register 9 (PINSEL9 - 0xE002 C024)

The PINSEL9 register controls the functions of the pins as per the settings listed in

Table 9–142

. The direction control bit in the FIO4DIR register is effective only when the

GPIO function is selected for a pin. For other functions, direction is controlled
automatically.

The bit functions in this register depend on the number of pins of each LPC2400 part. For
the 180-pin LPC2458, see

Table 9–142

. For the 208-pin LPC2460/68/70/78, see

Table 9–143

. LCD functions are available in LPC2470/78 only and are selected in

Table 9–145

Table 141. Pin function select register 8 (PINSEL8 - address 0xE002 C020) bit description

PINSEL8 Pin

name

Function
when 00

Function
when 01

Function
when 10

Function
when 11

Reset
value

1:0

P4[0]

GPIO Port 4.0

Reserved

3:2

P4[1]

GPIO Port 4.1

Reserved

5:4

P4[2]

GPIO Port 4.2

Reserved

7:6

P4[3]

GPIO Port 4.3

Reserved

9:8

P4[4]

GPIO Port 4.4

Reserved