MCZ33977EGR2 Freescale Semiconductor, MCZ33977EGR2 Datasheet - Page 23

• Manufacturer Part Number: MCZ33977EGR2
• Description: IC DRIVER SGL GAUGE SPI 24-SOIC
• Manufacturer: Freescale Semiconductor
• Type: Single Gauge Driverr

Specifications of MCZ33977EGR2

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: 100mA
• Voltage - Supply: 6.5 V ~ 26 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Operating Supply Voltage: 4.5 V to 5.5 V
• Supply Current: 1.8 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

by status bits MOV0. Additional details are provided in the
Internal clock Calibration
pointer velocity and acceleration. Guaranteeing these fall
below 1.0 MHz. The frequency range of the calibrated clock
maximums requires [that deleted PV] the nominal internal
clock frequency will always be below 1.0 MHz if bit PE4 is
Logic [0] when initiating a calibration command, followed by
an 8.0
1.0 MHz if bit PE4 is Logic [1]. Some applications may require
a slower calibrated clock due to a lower motor gear reduction
ratio. Writing Logic [1] to bit PE2 will slow the internal
oscillator by one-third. Slowing the oscillator accommodates
a longer calibration pulse without overrunning the internal
counter - a condition designed to generate a CAL fault
indication. For example, calibration for a clock frequency of
667 kHz would require a calibration pulse of 12
internal oscillator is slowed by writing PE2 to Logic [1], a 12
µ
CAL fault indication.
than is provided with the air core motor emulation feature.
Writing Logic [1] to bit PE5 will disable the air core emulation
for both gauges and provide an acceleration and deceleration
at the maximum that the velocity position ramp can provide.
Bit PE6 must always be written Logic [0] during all PECCR
writes if the device is being used to drive an MMT style motor.
Null Command for Status Read (PE12) Bit D12
Status Select (PE11) Bit D11
This bit selects the information clocked out of the SO pin.
RTZ Accumulator or Pointer Status Select (PE10) Bit D10
Table 9. Power, Enable, Calibration, and Configuration Register (PECCR)
Analog Integrated Circuit Device Data
Freescale Semiconductor
s calibration pulse may overrun the counter and generate a
Bits
Read
Write
Some applications may require a guaranteed maximum
Some applications may require faster pointer positioning
The bits in
• 0 = Disable
• 1 = Enable
• 0 = Device Status (the logic states of PE10, and PE9
• 1 = RTZ Accumulator Value, Gauge Pointer position, or
This bit is recognized only when PE11 = 1.
• 0 = RTZ Accumulator Value and status
• 1 = Pointer Position or Speed
are don’t cares)
Gauge Velocity ramp position (depending upon the
logic states of PE10, and PE9)
µ
s reference pulse. The frequency will be centered at
PE12
D12
–
Table 9
PE11
D11
are write-only.
–
section.
PE10
D10
–
PE9
D9
–
µ
s. Unless the
D8
–
0
PE7
Address 000
D7
–
PE6
Similarly, this bit must always be written as Logic [1] when
being used to control Switec style motors.
counter-clockwise position. A Logic [1] written to bit PE7 will
change the location of the position 0 for the gauge to the
farthest clockwise position. The pointer will always move
towards position 0 when executing an RTZ. Exercise care
when writing to PECCR bit PE7 in order to prevent an
accidental change of the position 0 location.
out of the SO pin. When bit PE11 is at Logic [0], the clocked
out bits will provide device status. If Logic [1] is written to bit
PE11, the bits clocked out of the SO pin, depending upon the
state of bits PE10:PE9, provides either:
section.
state of PE11:PE0 is ignored. This is referred to as the null
command and can be used to read device status without
affecting device operation.
Pointer Position or Pointer Speed Select (PE9) Bit D9
(PE8) Bit D8
commands.
Position 0 Location Select (PE7) Bit D7
direction will always be to the position 0.
Motor Type Selection (PE6) Bit D6
D6
–
The default Pointer Position 0 (PE7 = 0) will be the farthest
Bits PE11:PE9 determine the content of the bits clocked
• Accumulator information and detection status during
• Real time pointer position location at the time
• The real time step position of the pointer as described
Additional details are provided in the
If bit PE12 is Logic [1] during a PECCR command, the
This bit is recognized only if PE11 and PE10 = 1.
• 0 = Gauge Pointer Position
• 1 = Gauge Pointer Speed
This bit must be transmitted as Logic [0] for valid PECCR
This bit determines the Position 0 of the gauge. RTZ
• 0 = Position 0 is the most CCW (counterclockwise)
• 1 = Position 0 is the most CW (clockwise) position
• 0 = MMT Style (coil phase difference = 90°)
• 1 = Switec Style (coil phase difference = 60°)
the RTZ (PE10 Logic [0])
low (PE10 Logic [1] and PE9 Logic [0]), or
in the velocity
position
PE5
D5
–
PE4
D4
–
Table 6
LOGIC COMMANDS AND REGISTERS
FUNCTIONAL DEVICE OPERATION
PE3
D3
–
(PE10 and PE9 Logic [1]).
PE2
D2
–
SO Communication
D1
–
0
CS
PE0
goes
D0
–
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