Changes between Version 11 and Version 12 of TBR/BSP/LM3S6965

Timestamp:

12/17/11 06:07:05 (13 years ago)

Author:

Ivaylo

Comment:

TBR/BSP/LM3S6965

@@ -1 +1 @@
 = LM3S6965 =
 
-= Overview =
 
+= Device Overview =
+
+The heart of the EVB is a Stellaris LM3S6965 ARM Cortex-M3-based microcontroller. The LM3S6965 offers 256 KB Flash memory, 50-MHz operation, an Ethernet controller, and a wide range of peripherals. Refer to the LM3S6965 data sheet (order number DS-LM3S6965) for complete device details.
+The LM3S6965 microcontroller is factory programmed with a quickstart demo program. The quickstart program resides in the LM3S6965 on-chip Flash memory and runs each time power is applied, unless the quickstart has been replaced with a user program.
 = Stellaris Microcontroller LM3S6965 =
 
@@ -36 +39 @@
 = Processor =
 
+= Ethernet =
 
-= Block diagram =
+A key feature of the LM3S6965 microcontroller is its fully integrated Ethernet controller. Only a RJ45 jack with integrated magnetics and a few passive components are needed to complete the 10/100baseT interface. The RJ45 jack incorporates LEDs that indicate traffic and link status.
+These are automatically managed by on-chip microcontroller hardware. Alternatively, the LEDs can be software controlled by configuring those pins as general-purpose outputs.
+The LM3S6965 supports automatic MDI/MDI-X so the EVB can connect directly to a network or to another Ethernet device without requiring a cross-over cable.
+= Clocking =
 
-[wiki:File:Diagram23.png File:Diagram23.png]
-=  =References==
+The LM3S6965 microcontroller has four on-chip oscillators, three are implemented on the EVB. A
+8.0-MHz crystal completes the LM3S6965’s main internal clock circuit. An internal PLL, configured
+in software, multiples this clock to 50-MHz for core and peripheral timing.
+A small, 25-MHz crystal is used by the LM3S6965 microcontroller for Ethernet physical layer
+timing and is independent of the main oscillator.
+= Reset =
 
-
-http://www.ti.com/lit/ug/spmu029a/spmu029a.pdf
-
-http://www.ti.com/lit/ds/symlink/lm3s6965.pdf
+The LM3S6965 microcontroller shares its external reset input with the OLED display. In the EVB,
+reset sources are gated through the CPLD, though in a typical application a simple wired-OR
+arrangement is sufficient.
+Reset is asserted (active low) under any one of three conditions: