MC68HC05V12 Datasheet, PDF (33/246 Pages) Freescale Semiconductor, Inc – HCMOS Microcontreller Unit

1.6.13 I_MAX
Freescale Semiconductor, Inc.
General Description
Functional Pin Descriptions
This pin is used to define the maximum coil current in the gauges by
connecting a resistor from this pin (R_MAX) to ground as shown in
15.7 Coil Sequencer and Control.
1.6.14 V_PGC
This pin is the gauge power control pin for the external pass device.
Refer to 15.7 Coil Sequencer and Control.
1.6.15 V_GSUP
This pin is the regulated gauge voltage input. Refer to 15.7 Coil
Sequencer and Control.
1.6.16 V_SSG
Two pins are provided for a separate gauge driver ground, V_SSG. Used
as the current return only for the coil driver circuitry, it is a high-current
pin.
1.6.17 V_GVREF
This pin is the feedback pin for the gauge power regulator. External
resistors as shown in Figure 15-14. Sample Gauge Connections to
the MC68HC705V12 are used to set the gauge input voltage at pin
V_GSUP.
1.6.18 MAJA(B)1+, MAJA(B)1−, MAJA(B)2+, and MAJA(B)2−
These pins are the full H-bridge coil driver pins. The A or B refer to pins
associated with major gauge A or gauge B, and pin 1+/− or pin 2+/− refer
to coil 1 or coil 2 of that major gauge and the direction of current flow.
Refer to 15.3 Gauge System Overview for more details on the
operation of these pins.
MC68HC05V12 — Rev. 2.0
General Description
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Technical Data