LPC2102 datasheet(21/37 Pages) NXP

21 / 37 page

LPC2101_02_03_4

Product data sheet

Rev. 04 — 2 June 2009

21 of 37

NXP Semiconductors

LPC2101/02/03

Single-chip 16-bit/32-bit microcontrollers

6.18.1 EmbeddedICE

Standard ARM EmbeddedICE logic provides on-chip debug support. The debugging of

the target system requires a host computer running the debugger software and an

EmbeddedICE protocol converter. The EmbeddedICE protocol converter converts the

remote debug protocol commands to the JTAG data needed to access the ARM core.

The ARM core has a debug communication channel function built-in. The debug

communication channel allows a program running on the target to communicate with the

host debugger or another separate host without stopping the program ﬂow or even

entering the debug state. The debug communication channel is accessed as a

coprocessor 14 by the program running on the ARM7TDMI-S core. The debug

communication channel allows the JTAG port to be used for sending and receiving data

without affecting the normal program ﬂow. The debug communication channel data and

control registers are mapped in to addresses in the EmbeddedICE logic. The JTAG clock

(TCK) must be slower than 1

⁄

6 of the CPU clock (CCLK) for the JTAG interface to operate.

6.18.2 RealMonitor

RealMonitor is a conﬁgurable software module, developed by ARM Inc., which enables

real time debug. It is a lightweight debug monitor that runs in the background while users

debug their foreground application. It communicates with the host using the DCC, which is

present in the EmbeddedICE logic. The LPC2101/02/03 contain a speciﬁc conﬁguration of

RealMonitor software programmed into the on-chip boot ROM memory.

LPC2102 Datasheet(PDF) 21 Page - NXP Semiconductors