mc68hc705v12 Freescale Semiconductor, Inc, mc68hc705v12 Datasheet - Page 191

• Manufacturer Part Number: mc68hc705v12
• Description: M68hc05-based Mcu Hc05 Freescale Semiconductor
• Manufacturer: Freescale Semiconductor, Inc

15.6 Gauge Driver Control Registers
15.6.1 Gauge Enable Register
MC68HC705V12
—
Rev. 3.0
The gauge driver module requires the use of four types of control
registers:
Each register is described in more detail in the following sections.
All bits in this register are used to select which of the six gauges will be
driven when the gauge module is active. If any bit of bits 7-2 is set, the
gauge module will become active.
When all bits are cleared, the gauge module is considered off. As much
circuitry as possible is shut off to conserve power. The D/A, the coil
sequencing logic, and the coil current measurement circuits are turned
off. All high-side drivers in the H-bridge drivers are left on to absorb any
transient current that may be generated when the drivers are initially
turned on or off; all low-side drivers are high-Z.
The effects of these bits on the scanning sequence of the gauges are
described in
•
•
•
•
Freescale Semiconductor, Inc.
For More Information On This Product,
The gauge enable register enables or disables individual gauges.
The current magnitude registers set the amount of current to flow
in a particular coil.
The current direction register determines which direction the
current will flow in a coil.
The scan control register controls how the 12 coil drivers will be
sequenced and updated by the analog multiplexers and control
logic.
Go to: www.freescale.com
15.7 Coil Sequencer and
Gauge Drivers
Control.
Gauge Driver Control Registers
Advance Information
Gauge Drivers