mc33976 Freescale Semiconductor, Inc, mc33976 Datasheet - Page 15

• Manufacturer Part Number: mc33976
• Description: Dual Gauge Driver With Configurable Response Time
• Manufacturer: Freescale Semiconductor, Inc

information clocked out of the SO pin.
bit. This bit is recognized only when PE11 = 1.
This bit is recognized only if PE11 and PE10 = 1.
Position 0 of the selected gauge is determined by the PE7
selection. This bit is recognized only if PE11 and PE10 = 1
and PE9 = 0.
determines the Position 0 of the gauge selected by PE8. RTZ
direction will always be to the position 0.
enabled or disabled (acceleration and deceleration is
constant if disabled).
Table 8. Maximum Velocity Register (VELR)
The bits in
logic [0] for valid VELR commands
maximum velocity determined in the V7: V0 field will apply to
Gauge 1.
Analog Integrated Circuit Device Data
Freescale Semiconductor
Read
Write
Bits
PE11 (D11) — Status Select bit. This bit selects the
• 0 = Device Status (the logic states of PE10, PE9, and
• 1 = RTZ Accumulator Value, Gauge 0 or 1 Pointer
PE10 (D10) — RTZ Accumulator or Pointer Status Select
• 0 = RTZ Accumulator Value and status
• 1 = Pointer Position or Speed
PE9 (D9) — Pointer Position or Pointer Speed Select bit.
• 0 = Gauge 0 or Gauge 1 Pointer Position
• 1 = Gauge 0 and Gauge 1 Pointer Speed
PE8 (D8) — Pointer Position Gauge Select bit. Also the
• 0 = Gauge 0 position
• 1 = Gauge 1 position
PE7 (D7) — Position 0 Location Select bit. This bit
• 0 = Position 0 is the most CCW (counterclockwise)
• 1 = Position 0 is the most CW (clockwise) position
PE6 (D6) — Motor Type Selection bit.
• 0 = MMT Style (coil phase difference = 90°)
• 1 = Switec Style (coil phase difference = 60°)
PE5 (D5) — Air Core Motor Emulation bit. This bit is
• 0 = Enable
• 1 = Disable
V12:V10 (D12:D10) — These bits must be transmitted as
V9 (D9) — Gauge 1 Velocity. Specifies whether the
• 0 = Velocity does not apply to Gauge 1
• 1 = Velocity applies to Gauge 1
PE8 don’t cares)
position, or Gauge 0 and 1 Velocity ramp position
(depending upon the logic states of PE10, PE9, and
PE8)
position
Table 8
D12
–
0
are write-only.
D11
–
0
D10
–
0
D9
V9
–
D8
V8
–
D7
V7
–
Address 001
D6
V6
or disables the clock calibration.
disables the output driver of Gauge 1.
disables the output driver of Gauge 0.
Address 001 — Maximum Velocity Register (VELR)
maximum velocity for each gauge (refer to
V7:V0 contain a position value from 1– 225 that is
representative of the velocity position value described in
Table 30, Velocity
the maximum velocity until it is changed to another value. If a
maximum value is chosen greater than the maximum velocity
in the acceleration table, the maximum table value becomes
the maximum velocity. If the motor is turning at a speed
greater than the new maximum, the motor immediately
moves down the velocity ramp until the speed falls equal to
or below it. Velocity for each motor can be changed
simultaneously or independently by writing V8 and/or V9 to a
logic [1]. Bits V12:V10 must be at logic [0] for valid VELR
commands.
–
maximum velocity specified in the V7: V0 field will apply to
Gauge 0.
maximum velocity position from
velocity will remain the maximum of the intended gauge until
PE4 (D4) — Clock Calibration Frequency Selector
• 0 = Maximum f =1.0 MHz (for 8.0 µs calibration pulse)
• 1 = Nominal f =1.0 MHz (for 8.0 µs calibration pulse)
PE3 (D3) — Clock Calibration Enable bit. This bit enables
• 0 = Disable
• 1 = Enable
PE2 (D2) — Oscillator Adjustment
• 0 = t
• 1 = 0.66 x t
PE1 (D1) — Gauge 1 Enable bit. This bit enables or
• 0 = Disable
• 1 = Enable
PE0 (D0) — Gauge 0 Enable bit. This bit enables or
• 0 = Disable
• 1 = Enable
The Gauge Maximum Velocity Register is used to set a
V8 (D8) — Gauge 0 Velocity. Specifies whether the
• 0 = Velocity does not apply to Gauge 0
• 1 = Velocity applies to Gauge 0
V7:V0 (D7:D0) — Maximum Velocity. Specifies the
D5
V5
–
CLU
CLU
D4
V4
–
Table, page 28. The table value becomes
LOGIC COMMANDS AND REGISTERS
FUNCTIONAL DEVICE OPERATION
D3
V3
–
Table
D2
V2
–
30, page 28. This
Table
D1
V1
–
8). Bits
D0
V0
–
33976
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