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參數(shù)資料
| 型號： | MCZ33991EG |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Gauge Driver Integrated Circuit |
| 中文描述： | 儀表驅(qū)動集成電路 |
| 文件頁數(shù)： | 17/36頁 |
| 文件大小： | 481K |
| 代理商： | MCZ33991EG |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
17
33991
TIMING DESCRIPTIONS AND DIAGRAMS
COMMUNICATION MEMORY MAPS
combination is illustrated in Table 10. The default full step
time is 21.25 ms (0101). If there are two full steps per degree
of pointer movement, the pointer speed is: 1/(FS
×
2)°.
Bit D4 determines the provided blanking time immediately
following a full step change, and before enabling the
integration of the non-driven coil signal. The blanking time is
either 512
μ
s, when D4 is logic [0], or 768
μ
s when D4 is logic
[1].
Detecting pointer movement is accomplished by
integrating the back EMF present in the non-driven coil during
the RTZ event. The integration circuitry is implemented using
a Sigma-Delta converter resulting in a representative 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. If the RTZR D3:D2 bits were written as 10
or 11, the ST14 bit corresponds to bit D14 of the RTZ
accumulator, the sign bit. After a full step of integration, a sign
bit of 0 is the indicator of an accumulator exceeding the
decision threshold of 0, and the pointer is assumed to still be
moving. Similarly, if the sign bit is logic [1] after a full step of
integration, the accumulator value is negative and the pointer
is assumed to be stopped. The integrator and accumulator
are initialized after each full step.
Accurate pointer stall detection depends on a correctly
preloaded accumulator for specific gauge, pointer, and full
step combinations. Bits D12:D5 are used to offset the initial
RTZ accumulator value, properly detecting a stalled motor.
The initial accumulator value at the start of a full step of
integration is negative. If the accumulator was correctly
preloaded, a free moving pointer will result in a positive value
at the end of the integration time. A stalled pointer results in
a negative value. The preloaded values associated with each
combination of bits D12:D5 are illustrated in Table 11. The
accumulator should be loaded with a negative value resulting
in a transition of the accumulator MSB to a logic [1] when the
motor is stalled. After a power-up, or any reset in the Default
mode, the 33991 device sets the accumulator value to -1,
resulting in an unconditional RTZ pointer movement.
These bits are
write-only
.
RC12:RC5— These bits determine the preloaded value
into the RTZ integration accumulator to adjust the detection
threshold.
Values range from -1 (00000000) to -4081 (11111111)
provided in Table 11.
RC4—This bit determines the RTZ blanking time.
0 = 512
μ
s
1 = 768
μ
s
RC3:RC0— These bits determine the full step time during
an RTZ event, determining the pointer moving rate. Step
times range from 4.86 ms (0000) to 62.21ms (1111). Those
are illustrated in Table 10. The default time is 21.25 ms
(0101).
Table 12. RTZCR SI Register Assignment
Address: 101
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Write
RC12
RC11
RC10
RC9
RC8
RC7
RC6
RC5
RC4
RC3
RC2
RC1
RC0
Table 13. RTZCR Full Step Time
RC3
RC2
RC1
RC0
Full Step Time (ms)
0
0
0
0
4.86
0
0
0
1
4.86
0
0
1
0
8.96
0
0
1
1
13.06
0
1
0
0
17.15
0
1
0
1
21.25
0
1
1
0
25.34
0
1
1
1
29.44
1
0
0
0
33.54
1
0
0
1
37.63
1
0
1
0
41.73
1
0
1
1
45.82
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相關(guān)代理商/技術(shù)參數(shù) |
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| MCZ33991EGR2 | 功能描述:馬達/運動/點火控制器和驅(qū)動器 GAUGE DRIVER IC 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 |
| MCZ33993EW | 功能描述:接口 - 專用 MSDI RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 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:BGA-59 |
| MCZ33993EWR2 | 功能描述:接口 - 專用 MSDI RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 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:BGA-59 |
| MCZ33996CEK | 制造商:Freescale Semiconductor 功能描述:16 LOW SIDE SW - Bulk |
| MCZ33996CEKR2 | 制造商:Freescale Semiconductor 功能描述:16 LOW SIDE SW - Tape and Reel |
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