Table 64: Pin Function Select Register Bits - Philips LPC2194 User Manual

Philips Semiconductors
ARM-based Microcontroller
Table 64: Pin Function Select Register 2 for LPC2292/2294 (PINSEL2 - 0xE002C014)
PINSEL2
Controls the number of pins among P3.23/A23/XCLK and P3.22:2/A2.22:2 that are address lines:
000 = None
27:25 001 = A3:2 are address lines.
010 = A5:2 are address lines.
011 = A7:2 are address lines.
31:28 Reserved.
Pin Function Select Register Values
The PINSEL registers control the functions of device pins as shown below. Pairs of bits in these registers correspond to specific
device pins.
Table 65: Pin Function Select Register Bits
Pinsel0 and Pinsel1 Values
0 0
0 1
1 0
1 1
The direction control bit in the IO0DIR/IO1DIR register is effective only when the GPIO function is selected for a pin. For other
functions, direction is controlled automatically. Each derivative typically has a different pinout and therefore a different set of
functions possible for each pin. Details for a specific derivative may be found in the appropriate data sheet.
Pin Connect Block
Description
100 = A11:2 are address lines.
101 = A15:2 are address lines.
110 = A19:2 are address lines.
111 = A23:2 are address lines.
Primary (default) function, typically GPIO Port
First alternate function
Second alternate function
Reserved
LPC2119/2129/2194/2292/2294
Function
132
Preliminary User Manual
Reset Value
000 if
BOOT1:0=11
at Reset, 111
otherwise
-
Value after Reset
00
May 03, 2004