CSM-12C32 AXIOM, CSM-12C32 Datasheet - Page 14

• Manufacturer Part Number: CSM-12C32
• Description: MCU MODULE
• Manufacturer: AXIOM

Specifications of CSM-12C32

• Silicon Manufacturer: Freescale
• Core Architecture: HCS12
• Core Sub-architecture: S12C
• Features: Power Selection Jumper, Analog Comparator, SCI/SPI Communications Ports
• Kit Contents: Board, Cables, CD, Power Supply
• Silicon Core Number: MC9S12C32
• Silicon Family Name: S12C

C S M 1 2 C 3 2
U S E R
Serial Monitor Operation
A serial binary monitor is loaded in the MCU internal flash memory. Press and hold SW1 while
pressing the RESET button or applying power. This section provides a brief description of this
serial monitor operation. Refer to application note AN2548 for complete details on the serial
monitor operation. This application note may be found on the Support CD received with the
module or from the Freescale web site.
Serial Monitor Memory Map
Table 6: Serial Monitor Memory Map
The 2K-byte serial monitor program provides an RS-232 serial interface to a host PC. Serial
data rate is 115.2K bps. The monitor is compatible with Metrowerks CodeWarrior Develop-
ment Studio and other serial monitor interface IDE’s. The serial monitor is not compatible with
ASCII interface programs such as HyperTerm or AxIDE. The monitor supports 23 primitive
commands to control the target MCU. To allow a user to specify the address of each interrupt
service routine, this monitor redirects interrupt vectors to an unprotected portion of FLASH.
To boot to the serial monitor, the user simply pressed and holds SW1 while pressing the
RESET switch or applying power. The status of SW1 is read only during the rising edge of
RESET. To load user application on start-up, the user is responsible for programming the
pseudo-reset vector (0xF7FE:0xF7FF). Pressing SW1 after the MCU exits reset will not ac-
cess the serial monitor. After exiting reset, pressing SW1 has effect as defined in the user ap-
plication.
BDM_PORT Header
BDM access is gained through the BDM_PORT header. This is a 6-pin header that allows
connection of a compatible HCS12 BDM cable. Refer to the documentation for the specific
NOTE: Although the monitor does not support external memory, the user can enable external
memory accesses in the unfilled areas of the memory map.
0x0000 –
0x03FF
0x3800 –
0x3FFF
0x8000 –
0xBFFF
0xC000 –
0xF77F
0xF780 –
0xF7FF
0xF800 –
0xFFFF
G U I D E
Registers
Reserved
Internal RAM
(Relocated)
Reserved
Fixed Flash EEPROM Block 1
(visible at RESET)
Fixed Flash EEPROM Block 2
User Vectors (Relocated)
User Reset Vector F7FE:F7FF
Vectors (Protected)
14
1K bytes
2K bytes
16K bytes
13.8K bytes
2.12K bytes
A U G U S T
1 ,
2 0 0 8