OM13008,598 NXP Semiconductors, OM13008,598 Datasheet - Page 355

• Manufacturer Part Number: OM13008,598
• Description: BOARD LPC XPRESSO LPC122X
• Manufacturer: NXP Semiconductors
• Series: LPCXpressor

Specifications of OM13008,598

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-6642; OM13008

NXP Semiconductors
UM10441
User manual
24.5.2 Debug connections
During a debugging session, the System Tick Timer is automatically stopped whenever
the CPU is stopped. Other peripherals are not affected.
For debugging purposes, it is useful to provide access to the ISP entry pin PIO0_1. This
pin can be used to recover the part from configurations which would disable the SWD port
such as improper PLL configuration or reconfiguration of SWD pins as ADC inputs, entry
into Deep power-down mode out of reset, etc. This pin can be used for other functions
such as GPIO, but it should not be held low on power-up or reset.
Fig 59. Connecting the SWD pins to a standard SWD connector
The VTREF pin on the SWD connector enables the debug connector to match the target voltage.
SWDIO
SWCLK
nSRST
VTREF
All information provided in this document is subject to legal disclaimers.
GND
Rev. 1.1 — 10 March 2011
Gnd
VDD
Chapter 24: LPC122x Serial Wire Debug (SWD)
ISP entry
PIO0_12
SWDIO
SWCLK
RESET
UM10441
© NXP B.V. 2011. All rights reserved.
LPC122x
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