ULINK Debugger Comparison

Feature
Feature	ULINK2	ULINK-ME	ULINK1
Debugging Features
RAM Breakpoints	Unlimited	Unlimited	Unlimited
ROM Breakpoints (ARM7/9)	2 max	2 max	2 max
ROM Breakpoints (Cortex-M3)	8 max	8 max	8 max
ROM Breakpoints (µPSD) (Cannot Set While Executing)	5 max	n/a	5 max
ROM Breakpoints (XC800) (Cannot Set While Executing)	4 max	n/a	4 max
ROM Breakpoints (XC166)	4 max	n/a	4 max
Execution Breakpoints (Set While Executing)
Access Breakpoints (ARM7/9)	2 max (R/W Only, With Value)	2 max (R/W Only, With Value)	2 max (R/W Only, With Value)
Access Breakpoints (Cortex-M3)	4 max (With value)	4 max (With Value)
Access Breakpoints (µPSD)	3 max	n/a	3 max
Access Breakpoints (XC800)	1 in IDATA max	n/a	1 in IDATA max
Access Breakpoints (XC166)	1 max	n/a	1 max
Debugging Support
Real-Time Agent
Serial Wire Debug (Cortex-M3)
Serial Wire Viewer (Cortex-M3)
Trace History
Connector	10-, 14-, 16-, & 20-pin	20-pin only	14-, 16- & 20-pin
Performance
JTAG Clock	<= 10MHz	<= 10MHz	<= 1MHz
JTAG RTCK Support (Return Clock)
Memory R/W (Bytes/sec)	≈ 28K	≈ 28K	≈ 28K
Flash R/W (Bytes/sec)	≈ 25K	≈ 25K	≈ 15K
Single-Step (Fast) (Instructions/sec)	≈ 50	≈ 50	≈ 50
Supported Device Families
XC800 (8051)
µPSD (8051)
XC166/XE166/XC2000
LPC950 (8051)
ARM7
ARM9
Cortex-M1
Cortex-M3

Note that hardware breakpoints are limited by the ARM Embedded ICE Hardware.