CMD-12DP512 AXIOM, CMD-12DP512 Datasheet - Page 8

• Manufacturer Part Number: CMD-12DP512
• Description: Single Board Computer
• Manufacturer: AXIOM

Specifications of CMD-12DP512

• Silicon Manufacturer: Freescale
• Core Architecture: HCS12
• Core Sub-architecture: S12D
• Features: Onboard Back Ground Debug, Breadboard And Prototype Area
• Kit Contents: Board
• Silicon Family Name: S12D
• Silicon Core Number: MC9S12DP512

C M D - 1 2 D P 5 1 2
MODE Option
The MODE option jumper is installed by default for BDM application. The option allows the
selection at Reset of Single-chip Mode (installed) or Expanded Wide Mode (open) operation
for user applications of the HCS12. Single-chip Mode provides all I/O ports and no external
memory. Expanded Wide Mode provides the external memory bus and applies Ports A, B,
part of E, and optionally K for memory bus use. Port K application is determined by the Mode
register EMK bit setting at Reset initialization time.
ECS Option
The ECS option installed enables the upper address signals (A14 – A19) from Port K of the
HCS12 to drive the upper address lines of the external Ram on the board. This provides
external memory Paging capability to the memory bus. The HCS12 MODE register must have
the EMK bit set to support this operation also. With the ECS option open or idle, only the
linear 64K byte address map is available on the external address / data bus.
NO_AUTO Option
The NOAUTO option jumper should be open or off normally. The option applies a ground
potential to the Port E0 / XIRQ* interrupt line. Option is applied for MON12 operation, refer to
the CMD-12DP512 MON12 user manual for details.
INDICATORS
Indication is provided for power supply status, HCS12 Reset status, and User application.net
status. The indications may be applied to determine proper operation of the development
board or the Users application.
Indicator Summary
PWR
RESET
STATUS
LED1 - 4
INDICATOR
R E V
B .
Green
RED
Green
Green
COLOR
+5V Logic voltage present
HCS12 is in RESET state
USB BDM status indicator
ON with logic 1 or +5V applied
to respective input on USER I/O
connector.
OPERATION
8
ON
OFF
ON or flashing with USB
connection
Application specific
Refer to USER I/O
connector
DEFAULT CONDITION
0 8 / 2 3 / 0 7