DEMO9S12XEP100 Freescale Semiconductor, DEMO9S12XEP100 Datasheet - Page 292

• Manufacturer Part Number: DEMO9S12XEP100
• Description: BOARD DEMO FOR MC9S12XEP100
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of DEMO9S12XEP100

• Contents: Board, Cables, CD
• Processor To Be Evaluated: MC9S12XEP100
• Data Bus Width: 16 bit
• Interface Type: RS-232
• Silicon Manufacturer: Freescale
• Core Architecture: S12
• Core Sub-architecture: S12
• Silicon Core Number: MC9S12
• Silicon Family Name: S12XE
• Rohs Compliant: Yes
• For Use With/related Products: MC9S12XEP100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Chapter 7 Background Debug Module (S12XBDMV2)
7.4.4
Firmware commands are used to access and manipulate CPU resources. The system must be in active
BDM to execute standard BDM firmware commands, see
Normal instruction execution is suspended while the CPU executes the firmware located in the standard
BDM firmware lookup table. The hardware command BACKGROUND is the usual way to activate BDM.
As the system enters active BDM, the standard BDM firmware lookup table and BDM registers become
visible in the on-chip memory map at 0x7FFF00–0x7FFFFF, and the CPU begins executing the standard
BDM firmware. The standard BDM firmware watches for serial commands and executes them as they are
received.
The firmware commands are shown in
292
WRITE_WORD
NOTE:
Because of an order from the United States International Trade Commission, BGA-packaged product lines and partnumbers
If enabled, ACK will occur when data is ready for transmission for all BDM READ commands and will occur after the write is
complete for all BDM WRITE commands.
indicated here currently are not available from Freescale for import or sale in the United States prior to September 2010
Command
Standard BDM Firmware Commands
Opcode
(hex)
C8
16-bit address
16-bit data in
Table 7-6. Hardware Commands (continued)
MC9S12XE-Family Reference Manual , Rev. 1.23
Data
Table
Write to memory with standard BDM firmware lookup table out of map.
Must be aligned access.
7-7.
Section 7.4.2, “Enabling and Activating
Description
Freescale Semiconductor
BDM”.