EVB51JM128 Freescale Semiconductor, EVB51JM128 Datasheet - Page 19

• Manufacturer Part Number: EVB51JM128
• Description: BOARD EVAL FOR MCF51JM128 MCU
• Manufacturer: Freescale Semiconductor
• Series: ColdFire®r
• Type: MCUr

Specifications of EVB51JM128

• Contents: Evaluation Board
• Silicon Manufacturer: Freescale
• Core Architecture: Coldfire
• Core Sub-architecture: Coldfire V1
• Silicon Core Number: MCF51J
• Silicon Family Name: Flexis - MCF51JM
• Rohs Compliant: Yes
• For Use With/related Products: MCF51JM128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Table 10: HOST_EN
The VBUS_SEL option header allows the user to configure the voltage source used to power
VBUS when in HOST mode. Setting the VBUS_SEL jumper to the HOST position sources
VBUS from the on-board voltage regulator. The on-board regulator will supply up to 500mA of
current on VBUS when selected. The OTG position selects VBUS from the charge-pump at
U4. The charge-pump sources a minimum of 8mA on VBUS when selected.
Table 11: VBSEL
Refer to the MAX3353E datasheet for details on the operation of the configurable charge-
pump. Refer to the ADM869L datasheet for details on the operation of the hi-side switch.
ACCELEROMETER
The EVB51JM128 applies an MMA7260Q, 3-axis accelerometer for tilt and motion-sense ap-
plications. The accelerometer supports 4 user selectable sensitivities - 1.5g / 2g / 4g / 6g. The
SLEEP* input allows the device to be placed in a low-power mode. Separate X-, Y-, and Z-
axis readings are routed to the MCU. The X-axis output is routed to two separate inputs on the
target MCU. Low-pass filters remove hi-frequency components on each axis output.
Accelerometer Configuration
Accelerometer configuration is controlled either manually or under program control. Two op-
tion headers select the accelerometer sensitivity and one option header places the device in
low current, SLEEP, mode.
Figure 12: Accel Configuration Header
Signal
Signal
SLEEP • • • PTF6
PTH4
PTG0
PTH4
PTG0
SEL1 • • • PTA5
SEL2 • • • PTD7
U S E R
GND
ADM869L I/O
ON*
FAULT*
ADM869L I/O
ON*
FAULT*
G U I D E
NOTES
Jumper set to PTxx – input controlled by MCU
Jumper set GND – input low
Jumper OFF – input high
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F E B R U A R Y
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