Datasheet

LPC2141_42_44_46_48_2 © Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet Rev. 02 — 28 August 2006 10 of 39
Philips Semiconductors
LPC2141/42/44/46/48
Single-chip 16-bit/32-bit microcontrollers
P0.31/UP_LED/
CONNECT
17
[6]
O P0.31 — General purpose output only digital pin (GPO).
O UP_LED — USB GoodLink LED indicator. It is LOW when device is
configured (non-control endpoints enabled). It is HIGH when the device is not
configured or during global suspend.
O CONNECT — Signal used to switch an external 1.5 kΩ resistor under the
software control. Used with the SoftConnect USB feature.
Important: This is an digital output only pin. This pin MUST NOT be
externally pulled LOW when
RESET pin is LOW or the JTAG port will be
disabled.
P1.0 to P1.31 I/O Port 1: Port 1 is a 32-bit bidirectional I/O port with individual direction controls
for each bit. The operation of port 1 pins depends upon the pin function
selected via the pin connect block. Pins 0 through 15 of port 1 are not
available.
P1.16/
TRACEPKT0
16
[6]
I/O P1.16 — General purpose input/output digital pin (GPIO).
O TRACEPKT0 — Trace Packet, bit 0. Standard I/O port with internal pull-up.
P1.17/
TRACEPKT1
12
[6]
I/O P1.17 — General purpose input/output digital pin (GPIO).
O TRACEPKT1 — Trace Packet, bit 1. Standard I/O port with internal pull-up.
P1.18/
TRACEPKT2
8
[6]
I/O P1.18 — General purpose input/output digital pin (GPIO).
O TRACEPKT2 — Trace Packet, bit 2. Standard I/O port with internal pull-up.
P1.19/
TRACEPKT3
4
[6]
I/O P1.19 — General purpose input/output digital pin (GPIO).
O TRACEPKT3 — Trace Packet, bit 3. Standard I/O port with internal pull-up.
P1.20/
TRACESYNC
48
[6]
I/O P1.20 — General purpose input/output digital pin (GPIO).
O TRACESYNC — Trace Synchronization. Standard I/O port with internal
pull-up.
Note: LOW on this pin while
RESET is LOW enables pins P1.25:16 to
operate as Trace port after reset.
P1.21/
PIPESTAT0
44
[6]
I/O P1.21 — General purpose input/output digital pin (GPIO).
O PIPESTAT0 — Pipeline Status, bit 0. Standard I/O port with internal pull-up.
P1.22/
PIPESTAT1
40
[6]
I/O P1.22 — General purpose input/output digital pin (GPIO).
O PIPESTAT1 — Pipeline Status, bit 1. Standard I/O port with internal pull-up.
P1.23/
PIPESTAT2
36
[6]
I/O P1.23 — General purpose input/output digital pin (GPIO).
O PIPESTAT2 — Pipeline Status, bit 2. Standard I/O port with internal pull-up.
P1.24/
TRACECLK
32
[6]
I/O P1.24 — General purpose input/output digital pin (GPIO).
O TRACECLK — Trace Clock. Standard I/O port with internal pull-up.
P1.25/EXTIN0 28
[6]
I/O P1.25 — General purpose input/output digital pin (GPIO).
I EXTIN0 — External Trigger Input. Standard I/O with internal pull-up.
P1.26/RTCK 24
[6]
I/O P1.26 — General purpose input/output digital pin (GPIO).
I/O RTCK — Returned Test Clock output. Extra signal added to the JTAG port.
Assists debugger synchronization when processor frequency varies.
Bidirectional pin with internal pull-up.
Note: LOW on RTCK while
RESET is LOW enables pins P1.31:26 to operate
as Debug port after reset.
P1.27/TDO 64
[6]
I/O P1.27 — General purpose input/output digital pin (GPIO).
O TDO — Test Data out for JTAG interface.
Table 3. Pin description
…continued
Symbol Pin Type Description