DEMO9S08EL32 Freescale, DEMO9S08EL32 Datasheet - Page 7

• Manufacturer Part Number: DEMO9S08EL32
• Manufacturer: Freescale

Specifications of DEMO9S08EL32

• Lead Free Status / RoHS Status: Supplier Unconfirmed

U S E R
DEVELOPMENT SUPPORT
Application development and debug for the target MC9S08EL32 is supported through a
background debug mode (BDM) interface. The BDM interface consists of an integrated USB
BDM and a 6-pin interface header (BDM_PORT). The BDM_PORT header allows connecting
a HCS12/HCS08 BDM cable.
Integrated BDM
The DEMO9S08EL32 board features an integrated USB BDM. The integrated USB BDM
supports application development and debugging via background debug mode. All necessary
signals are provided by the integrated USB BDM.
connection from the target board to the host PC.
The integrated USB BDM provides +5V power and ground to target board eliminating the need
to power the board externally. Power from the USB BDM is derived from the USB bus;
therefore, total current consumption for the target board, and connected circuitry, must not
exceed 500mA. This current limit describes the current supplied by the USB cable to the
BDM circuit, the target board, and any connected circuitry. Excessive current drain will violate
the USB specification causing the bus to disconnect. Damage to the host PC USB hub or the
target board may result.
BDM_PORT Header
A compatible HCS12 BDM cable can also attach to the 6-pin BDM interface header
(BDM_PORT). This header is not installed in default configuration. Figure 1 below shows the
pin-out for the BDM_PORT header. This information is included for completeness.
Figure 1: BDM_PORT Header
POWER
The DEMO9S08EL32 is designed to allow the user to power the board through the USB BDM
during application development. A 2.0-mm barrel connector has been applied to support
stand-alone operation and to support LIN functionality. The board may also be powered
through connector J1. This connection may also be used to supply power from the board to
external circuitry. Optionally, the board may be powered from the LIN connectors.
G U I D E
NOTE: This header is not installed in default configuration.
BKGD
1
3
5
2
4
6
GND
RESET*
VDD
See the MC9S08EL32 Data Sheet for complete
DEBUG documentation
7
A USB, type B, connector provides