MCZ33976EG Freescale Semiconductor, MCZ33976EG Datasheet - Page 23

• Manufacturer Part Number: MCZ33976EG
• Description: IC DRIVER DUAL GAUGE SPI 24-SOIC
• Manufacturer: Freescale Semiconductor
• Type: Serial Peripheral Interface (SPI) Dual Step Motor Gauge Driverr

Specifications of MCZ33976EG

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 2
• 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)
• Supply Current: 4 mA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

command after re-enabling the gauge using the PECCR
command. This bit remains logic [1] until the gauge is
enabled.
logic [1] on this bit indicates that the coil drive circuitry
dedicated to drive Gauge 0 has exceeded the maximum
allowable junction temperature since the last SPI
communication and that Gauge 0 has been disabled. It is
recommended that the pointer be re-calibrated using the RTZ
command after re-enabling the gauge using the PECCR
Table 22. RTZ Accumulator Status Output Register
The bits in
on this bit indicates that the Gauge is in the process of
returning to the zero position as requested with the RTZ
command. This bit will continue to indicate a logic [1] until the
SPI message following a detection of the zero position, or the
RTZ feature is commanded OFF using the RTZ message.
RTZ accumulator. They represent the integrated signal
present on the non-driven coil during an RTZ event. These
bits are logic [0] after power-on reset, or after the
transitions from logic [0] to [1]. After an RTZ event, they will
represent the last RTZ accumulator result before the RTZ
was stopped. ACC14 is the MSB and is the sign bit used for
zero detection. Negative numbers have MSB logic [1] and
are coded in two’s complement.
Analog Integrated Circuit Device Data
Freescale Semiconductor
Read
Write
Bits
• 0 = Temperature within range
• 1 = Gauge 1 maximum allowable junction temperature
OT0 (OD0) — Gauge 0 Junction Overtemperature. A
RTZ (OD15) — RTZ Bit Is Enabled or Disabled. A logic [1]
• 0 = Return to Zero disabled
• 1 = Return to Zero enabled successfully
ACC14:ACC0 (OD14:OD0) — These 15 bits are from the
condition has been reached
OD15
RTZ
Table 22
–
ACC14 ACC13 ACC12 ACC11 ACC10 ACC9
OD14
–
are read-only bits.
OD13
–
OD12
–
OD11
–
OD10
–
RST
OD9
pin
–
ACC8
OD8
–
command. This bit remains logic [1] until the gauge is re-
enabled.
RTZ Accumulator Status Information
Accumulator status output:
Table 21.
the expected magnitude of motor back e.m.f. signals, which
is usually less than 500mV. Input signals greater than this will
not cause any damage (the circuit is connected to the motor
H-Bridge drivers, and thus is exposed to the full magnitude of
the drive voltages), but may cause some small loss of
linearity. A typical plot of output vs. input is shown in
for 4ms step times.
Gauge 0 Pointer Position Status Information
Gauge 0 Pointer Position status output:
Table 23.
x = Don’t care.
ACC7
OD7
•0 = Temperature within range1 = Gauge 0 maximum
Most recent valid PECCR command resulting in the RTZ
The analog-to-digital converter's linear input range covers
Most recent valid PECCR command resulting in the
–
allowable junction temperature condition is reached
D11
D11
1
1
ACC6 ACC5
OD6
–
Figure 8. RTZ Accumulator (Typical)
OD5
–
D10
D10
0
1
LOGIC COMMANDS AND REGISTERS
ACC4
OD4
–
FUNCTIONAL DEVICE OPERATION
ACC3
OD3
–
D9
D9
x
0
AC2C
OD2
–
ACC1
OD1
–
D8
Figure 8
D8
x
0
ACC0
OD0
33976
–
23