Datasheet
LPC15XX All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet Rev. 1 — 19 February 2014 51 of 99
NXP Semiconductors
LPC15xx
32-bit ARM Cortex-M3 microcontroller
8.42 Emulation and debugging
Debug functions are integrated into the ARM Cortex-M3. Serial wire debug functions are
supported in addition to a standard JTAG boundary scan. The ARM Cortex-M3 is
configured to support up to four breakpoints and two watch points.
The RESET
pin selects between the JTAG boundary scan (RESET = LOW) and the ARM
SWD debug (RESET
= HIGH). The ARM SWD debug port is disabled while the LPC15xx
is in reset.
To perform boundary scan testing, follow these steps:
1. Erase any user code residing in flash.
2. Power up the part with the RESET
pin pulled HIGH externally.
3. Wait for at least 250 s.
4. Pull the RESET
pin LOW externally.
5. Perform boundary scan operations.
6. Once the boundary scan operations are completed, assert the TRST
pin to enable the
SWD debug mode, and release the RESET
pin (pull HIGH).
Remark: The JTAG interface cannot be used for debug purposes.
9. Limiting values
Table 9. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
[1]
Symbol Parameter Conditions Min Max Unit
V
DD
supply voltage (3.3 V)
[2]
0.5 V
DDA
V
V
DDA
analog supply voltage 0.5 +4.6 V
V
ref
reference voltage on pin VREFP_DAC_VDDCMP 0.5 V
DDA
V
on pin VREFP_ADC 0.5 V
DDA
V
V
BAT
battery supply voltage 0.5 +4.6 V
V
I
input voltage 5 V tolerant I/O pins; only valid
when the V
DD(IO)
supply voltage
is present
[3][4]
0.5 +5.5 V
on I2C open-drain pins
PIO0_22, PIO0_23
[5]
0.5 +5.5 V
3 V tolerant I/O pin without
over-voltage protection. Applies
to PIO0_12.
[6]
0.5 V
DDA
V
USB_DM, USB_DP pins 0.5 V
DD
+ 0.5 V
V
IA
analog input voltage
[7][8]
[9]
0.5 +4.6 V
V
i(xtal)
crystal input voltage
[2]
0.5 +2.5 V
V
i(rtcx)
32 kHz oscillator input voltage
[2]
0.5 +4.6 V
I
DD
supply current per supply pin - 100 mA
I
SS
ground current per ground pin - 100 mA