ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 233

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.3
14.4
14.4.1
6430D–ATARM–25-Mar-11
Debug and Test Pin Description
Functional Description
Test Pin
Figure 14-3. Application Test Environment Example
Table 14-1.
Note:
One dedicated pin, TST, is used to define the device operating mode. When this pin is at low
level during power-up, the device is in normal operating mode. When at high level, the device is
in test mode or FFPI mode. The TST pin integrates a permanent pull-down resistor of about
15 kΩ, so that it can be left unconnected for normal operation. Note that when setting the TST pin
Signal Name
NRST
TST
TCK/SWCLK
TDI
TDO/TRACESWO
TMS/SWDIO
JTAGSEL
1. TDO pin is set in input mode when the Cortex-M3 Core is not in debug mode. Thus an external
pull-up (100 kΩ) must be added to avoid current consumption due to floating input.
Debug and Test Signal List
SAM3-based Application Board In Test
Connector
JTAG
Probe
JTAG
Function
Microcontroller Reset
Test Select
Test Clock/Serial Wire Clock
Test Data In
Test Data Out/Trace Asynchronous
Data Out
Test Mode Select/Serial Wire
Input/Output
JTAG Selection
SAM3
Chip n
SWD/JTAG
Reset/Test
Test Adaptor
Chip 2
Chip 1
Tester
Input/Output
Output
Type
Input
Input
Input
Input
Input
SAM3U Series
(1)
Active Level
High
Low
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