Texas Instruments eZ-FET Emulation IP, User Manual

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Debug Probes Hardware and Software
39 SLAU647L – July 2015 – Revised February 2018
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MSP Debuggers
5.8.1 General Features
The following features are provided by the eZ-FET and eZ-FET Lite debug probes.
Features:
• eZ-FET and eZ-FET Lite supported since:
– CCS v5.4.0
– IAR EW430 v5.52.1 and v5.51.6
• Operating systems: OS X, Linux, Windows
• Fixed supply voltage between 3.3 or 3.6 V at 75 mA
• Support Spy-Bi-Wire (2-wire JTAG) debug protocol
• Software breakpoint in flash, FRAM, and RAM support
• Flash and FRAM programming support
• Backchannel UART
• eZ-FET only – EnergyTrace and Ener+ support
• EnergyTrace technology accuracy
– Current < 25 µA: Error range = ±500 nA
– Current ≥ 25 µA and ≤ 75 mA: Error range = ±5%
• Software field update is possible
5.8.2 Backchannel UART
Supported baud rates depend on the target configuration and the debug settings. Table 12 shows which
baud rates are supported with certain configuration combinations.
✓ means that the corresponding baud rate is supported without any data loss with the specified
combination of settings.
✗ means that the corresponding baud rate is not supported (data loss is expected) with the specified
combination of settings.
Table 12. eZ-FET and eZ-FET Lite Backchannel UART Implementation
Target MCLK
Frequency:
1 MHz 8 MHz 1 MHz 8 MHz
Debugger: Active Inactive
Flow Control: No Yes No Yes No Yes No Yes
4800 baud ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
9600 baud
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
19200 baud ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
28800 baud ✗ ✓ ✓ ✓ ✓ ✓ ✓ ✓
38400 baud ✗ ✓ ✗ ✓ ✗ ✓ ✗ ✓
57600 baud ✗ ✓ ✗ ✓ ✗ ✓ ✗ ✓
115200 baud
✗ ✗ ✗ ✓ ✗ ✗ ✗ ✓
5.8.2.1 eZ-FET and eZ-FET Lite UART Backchannel Activation Commands
The eZ-FET supports two different backchannel UART modes, one with flow control and one without. The
different modes can be selected by opening the corresponding COM port with a dedicated baud rate. See
Table 13 for the specific baud rates for each command.
NOTE: The baud rates used by these commands cannot be used for communication.
If none of the specified commands are transferred before setting the communication baud rate,
communication starts with these default settings: V
CC
on, no flow control mechanism, no parity.