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LPC2148 Datasheet(PDF) 10 Page - NXP Semiconductors |
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LPC2148 Datasheet(HTML) 10 Page - NXP Semiconductors |
10 / 38 page 9397 750 14985 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Preliminary data sheet Rev. 01 — 3 October 2005 10 of 38 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 k Ω 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 |
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