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Philips Semiconductors
ARM-based Microcontroller
Table 56: Pin description for LPC2292/2294
Pin
LQFP144
Name
Pin #
1
10
11
12
13
16
17
18
19
20
89-
87,81,80,74-
P3.0
71,66-
to
62,56,55,53,48
P3.31
-
44,41,40,36,35
,30-27,97,96
89
Pin Configuration
Type
P2.22
D22
I/O
P2.23
D23
I/O
P2.24
D24
I/O
P2.25
D25
I/O
I/O
P2.26
D26
I
BOOT0
I/O
P2.27
D27
I
BOOT1
P2.28
D28
I/O
P2.29
D29
I/O
P2.30
D30
I/O
AIN4
I
P2.31
D31
I/O
AIN5
I
Port 3: Port 3 is a 32-bit bi-directional I/O port with individual direction controls for each bit.
The operation of port 3 pins depends upon the pin function selected via the Pin Connect
Block.
Note: All Port 3 pins excluding those that can be used as A/D inputs (P3.28 and P3.29)
I/O
are functionally 5V tolerant. Port 3 pin configured to perform an input function will use built-
in pull-up resistor to set the default input level to high. If the A/D converter is not used at all,
pins associated with A/D inputs can be used as 5V tolerant digital IO pins. See "A/D
Converter" chapter for A/D input pin voltage considerations.
P3.0
A0
O
LPC2119/2129/2194/2292/2294
Description
External memory data line 22.
External memory data line 23.
External memory data line 24.
External memory data line 25.
External memory data line 26.
While RESET is low, together with BOOT1 controls booting and
internal operation. Internal pullup ensures high state if pin is left
unconnected.
External memory data line 27.
While RESET is low, together with BOOT0 controls booting and
internal operation. Internal pullup ensures high state if pin is left
unconnected.
BOOT1:0=00 selects 8-bit memory on CS0 for boot.
BOOT1:0=01 selects 16-bit memory on CS0 for boot.
BOOT1:0=10 selects 32-bit memory on CS0 for boot.
BOOT1:0=11 selects Internal Flash memory.
External memory data line 28.
External memory data line 29.
External memory data line 30.
A/D converter, input 4. This analog input is always connected to
its pin.
External memory data line 31.
A/D converter, input 5. This analog input is always connected to
its pin.
External memory address line 0.
122
Preliminary User Manual
May 03, 2004
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