M68EVB912C32 Freescale Semiconductor, M68EVB912C32 Datasheet - Page 14

• Manufacturer Part Number: M68EVB912C32
• Description: BOARD EVAL FOR MC9S12C32
• Manufacturer: Freescale Semiconductor

Specifications of M68EVB912C32

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Freescale Semiconductor, Inc.
M 6 8 E V B 9 1 2 C 3 2
0 5 / 1 5 / 0 3
RC11,12,and 13 CAN Terminations
RC11, RC12, and RC13 provide SMT 1206 size component locations to apply CAN network
termination and bias. The values of these components should be determined by the media
type and CAN network requirements.
RC12 = Termination, connected between CAN-HI and CAN-LO.
RC11 = BIAS, CAN-HI idle bias to ground potential.
RC13 = BIAS, CAN-LO idle bias to +5V potential.
LED 1-8 Indicators and LED_EN Option
LED Indicators 1–8 are provided for user application and reflect HCS12 I/O ports PTB0 –
PTB7 logic value respectfully when the LED_EN option is installed. PTB0 – PTB7 are buffered
from the LED indicators by U5. The LED indicators will light with a logic high signal applied
from the respective HCS12 I/O port. The user may apply the PTB signals as inputs or outputs.
PTB outputs will allow the user application to control LED indication with a logic high output.
PTB inputs will provide a logic input status indication and should be driven from external
circuits connected on the MCU_PORT.
SW1 DIP Switch and SW1_EN Option
With SW1_EN option installed the SW1 positions 1 – 8 provide input to HCS12 ports PTA0 –
PTA7 respectfully. The user should apply caution that the PTA0-7 ports are configured to be
inputs at all times when the SW1_EN option is installed. The SW1 positions provide a logic
low input when in the OFF position and a logic high input when in the ON position. SW1
position 6 also provides the EVB Monitor selection during Reset or power on condition. (Refer
to M68EVB912C32 STARTUP).
Optional Serial EEPROM
The U4 socket and JP1-4 Options provide for the optional installation and connection of an
industry standard SPI type Serial EEPROM device.
The standard device referred to for
installation in the EVB is the ATMEL AT25010 or larger capacity device. The JP1-4 option s
will complete the HCS12 SPI port to EEPROM connections if installed.
Refer to the
M68EVB912C32 schematic drawing for more detail.
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