參數(shù)資料
型號： MCZ33976EG
廠商： 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述： Dual Gauge Driver with Configurable esponse Time
中文描述： 雙計驅(qū)動器，可配置esponse時間
文件頁數(shù)： 17/41頁
文件大小： 551K
代理商： MCZ33976EG
Analog Integrated Circuit Device Data
Freescale Semiconductor
17
33976
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
The register bits in
Table 11
are
write-only
.
RZ12:RZ5 (D12:D5) — These bits must be transmitted as
logic [0] for valid commands.
RZ4 (D4) — This bit is used to enable an unconditional
RTZ event.
0 = Automatic Return to Zero
1 = Unconditional Return to Zero
RZ3 (D3) — This bit must be transmitted as logic [0] for
valid commands.
RZ2 (D2) — Return to Zero Direction bit. This bit is used to
properly sequence the integrator, depending upon the
desired zeroing direction.
0 = Return to Zero will occur in the CCW direction
(PE7 = 0)
1 = Return to Zero will occur in the CW direction
(PE7 = 1)
RZ1 (D1) — Return to Zero Direction. This bit commands
the selected gauge to return the pointer to zero position.
0 = Return to Zero Disabled
1 = Return to Zero Enabled
RZ0 (D0) — Gauge Select: Gauge 0/Gauge 1. This bit
selects the gauge to be commanded.
0 = Selects Gauge 0
1 = Selects Gauge 1
Address 101 — Gauge Return to Zero Configuration
Register
Gauge Return to Zero Configuration Register (RTZCR) is
used to configure the Return to Zero Event (refer to
Table 12
,
page
18
). It is written to modify (1) the step time, or rate at
which the pointer moves during an RTZ event, (2) the
integration blanking time, which is the time immediately
following the transition of a coil from a driven state to an open
state in the RTZ mode, and (3) the threshold of the RTZ
integration register.
The values used for this register should be selected during
development to optimize the RTZ for each application.
Selecting an RTZ step rate resulting in consistently
successful zero detections depends on a clear understanding
of the motor characteristics. Specifically, resonant
frequencies exist due to the interaction between the motor
and the pointer. This command allows movement of the RTZ
pointer speed away from these frequencies. Also, some
motors require a significant amount of time for the pointer to
settle to a steady state position when moving from one full
step position to the next. Consistent and accurate integration
values require the pointer be stationary at the end of the full
step time.
Bits RC3:RC0, RC12:RC11, and RC4 determine the time
spent at each full step during an RTZ event. Bits RC3:RC0
are used to select a
t ranging from 0 ms (0000) to 61.44 ms
(1111) in increments of 4.096 ms (refer to
Table 13
,
page
18
). The
t is multiplied by the factor M, which is
defined by bits RC12:RC11. The product is then added to the
blanking time, selected using bit RC4, to generate the full
step time. The multiplier selected with RC12:RC11 will be
1 (00), 2 (01), or 4 (10) as illustrated in the equations below.
The multiplier selected with RC12:RC11 will be 1 (00), 2 (01),
or 4 (10) as illustrated in the equations below. Note that the
RC12:RC11 value of 8 (11) is not recommended for use in a
product design application, because of the potential for an
RTZ accumulator internal overflow, due to the long time step.
The blanking time that is selected with bit RC4 determines
the time that is provided immediately following a full step
change, before enabling the integration of the non-driven coil
signal. The blanking time is either 512
μ
s when RC4 is logic
[0], or 768
μ
s when it is logic [1].The full step time is
generated using the following equations:
When D3:D0 (RC3:RC0)
≠
0000
Full Step (t) =
t x M + blanking (t)
(1)
When D3:D0 (RC3:RC0) = 0000
Full Step (t) = blanking (t) + 2.048 ms (2)
Note
In equation (2), a 2.048 ms offset is added to the full
step time when the RC3:RC0 = 0000. The full step time
default value after a logic reset is 12.80 ms
(RC12:RC11 = 00, RC4 = 0, and RC3:RC0 = 0011).
If there are two full steps per degree of pointer movement,
the pointer speed is 1/(FullStep x 2) deg/s.
Detecting pointer movement is accomplished by
integrating the EMF present in the non-driven coil during the
RTZ event. The integration circuitry is implemented using a
Sigma-Delta converter resulting in the placement of a value
in the 15-bit RTZ accumulator at the end of each full step. The
value in the RTZ accumulator represents the change in flux
and is compared to a threshold. Values above the threshold
indicate a pointer is moving. Values below the threshold
indicate a stalled pointer, thereby resulting in the cessation of
the RTZ event.
The RTZ accumulator bits are signed and represented in
two’s complement. After a full step of integration, a sign bit of
Table 11. Return to Zero Register (RTZR)
Address 100
Bits
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Read
–
–
–
–
–
–
–
–
–
–
–
–
–
Write
0
0
0
0
0
0
0
0
RZ4
0
RZ2
RZ1
RZ0
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCZ33976EG 制造商:Freescale Semiconductor 功能描述:IC STEPPER MOTOR GUAGE DRIVER SPI
MCZ33976EG/R2 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Dual Gauge Driver with Configurable Response Time
MCZ33976EGR2 功能描述:功率驅(qū)動器IC CONFIG DUAL GAUGE DR RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
MCZ33977EG 功能描述:馬達/運動/點火控制器和驅(qū)動器 SINGLE GAUGE DR. LG PTR RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
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