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參數(shù)資料
| 型號(hào)： | 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(jì)驅(qū)動(dòng)器，可配置esponse時(shí)間 |
| 文件頁數(shù)： | 14/41頁 |
| 文件大?。?/td> | 551K |
| 代理商： | MCZ33976EG |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
14
33976
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
be clocked out into the SO pin, or (6) send a null command
for the purpose of reading the status bits. This register is also
used to place the 33976 into a low current consumption
mode.
Each of the gauge drivers can be enabled by writing a
logic [1] to their assigned address bits, PE0 and PE1
respectively. This feature could be used to disable a driver if
it is failing or is not being used. The device can be placed into
a standby current mode by writing a logic [0] to both PE0 and
PE1. During this state, most current consuming circuits are
biased off. When in the Standby mode, the internal clock will
remain ON.
The internal state machine utilizes a ROM table of step
times defining the duration that the motor will spend at each
microstep as it accelerates or decelerates to a commanded
position. The accuracy of the acceleration and velocity of the
motor is directly related to the accuracy of the internal clock.
Although the accuracy of the internal clock is temperature
independent, the non-calibrated tolerance is +70% to -35%.
The 33976 was designed with a feature allowing the internal
clock to be software calibrated to a tighter tolerance of ±10%,
using the
CS
pin and a reference time pulse provided by the
microcontroller.
Calibration of the internal clock is initiated by writing a
logic [1] to PE3. The calibration pulse, which must be 8.0
μ
s
for an internal clock speed of 1.0 MHz, will be sent on the
CS
pin immediately after the SPI word is sent. No other SPI lines
will be toggled. A clock calibration will be allowed only if the
gauges are disabled or the pointers are not moving, as
indicated by status bits MOV0 and MOV1. Additional details
are provided in the
Internal Clock Calibration
section,
beginning on page
30
.
Some applications may require a guaranteed maximum
pointer velocity and acceleration. Guaranteeing these
maximums requires that the nominal internal clock frequency
fall below 1.0 MHz. The frequency range of the calibrated
clock will always be below 1.0 MHz if bit PE4 is logic [0] when
initiating a calibration command, followed by an 8.0
μ
s
reference pulse. The frequency will be centered at 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 a logic [1]
to bit PE2 will slow the internal oscillator by one-third. Slowing
the clock 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
μ
s. Unless the internal oscillator is slowed by
writing PE2 to logic [1], a 12
μ
s calibration pulse may overrun
the counter and generate a CAL fault indication.
Some applications may require faster pointer positioning
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.
If the Hold Counts need to be enabled and disabled
dynamically, then the POSxR commands could also be used.
Bit PE6 must always be written as a logic [0] during all
PECCR writes if the device is being used to drive an MMT
style motor. Similarly, this bit must always be written as a
logic [1] when being used to control Switec style motors.
The default Pointer Position 0 (PE7 = 0) will be the farthest
counter-clockwise position. A logic [1] written to bit PE7 will
change the location of the position 0, for the gauge selected
by bit PE8, to the farthest clockwise position. A change in
position 0 of only one, or both, of the two coils can be
accomplished by using bits PE8 and PE7. Performing an RTZ
will always move the pointer to position 0. Exercise care
when writing to PECCR bits PE8 and PE7 in order to prevent
accidental changes of the position 0 locations.
Bits PE11:PE8 determine the content of the bits clocked
out of the SO pin. When bit PE11 is at logic [0], the clocked
out bits will provide device status. If a logic [1] is written to bit
PE11, the bits clocked out of the SO pin, depending upon the
state of bits PE10:PE8, provides either:
Accumulator information and detection status during
the RTZ (PE10 logic [0])
Real time pointer position location at the time
CS
goes
low (PE10 logic [1] and PE9 logic [0]), or
The real time step position of the pointer as described
in the velocity
Table 30
, page
28
(PE10, PE9, and PE8
logic [1]).
Additional details are provided in the
SO Communication
section beginning on page
21
.
If bit PE12 is logic [1] during a PECCR command, the 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.
The bits in
Table 7
are
write-only
.
PE12 (D12) — Null Command for Status Read
0 = Disable
1 = Enable
Table 7. Power, Enable, Calibration, and Configuration Register (PECCR)
Address 000
Bits
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Read
–
–
–
–
–
–
–
–
–
–
–
–
–
Write
PE12
PE11
PE10
PE9
PE8
PE7
PE6
PE5
PE4
PE3
PE2
PE1
PE0
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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(dòng)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(shí)間: 下降時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MCZ33977EG | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MCZ33977EG | 制造商:Freescale Semiconductor 功能描述:IC STEPPER MOTOR GAUGE DRIVER SPI |
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