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參數資料
| 型號： | MC33192DW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | MI-BUS INTERFACE STEPPER MOTOR CONTROLLER |
| 中文描述： | STEPPER MOTOR CONTROLLER, 0.26 A, PDSO16 |
| 封裝： | PLASTIC, SO-16 |
| 文件頁數： | 9/12頁 |
| 文件大?。?/td> | 190K |
| 代理商： | MC33192DW |
MC33192
9
MOTOROLA ANALOG IC DEVICE DATA
programming OK code “100”
indicating the address
programming to be executed.
The First and Second Instructions must be repeated until
the MCU successfully receives the programming code
“100”. Address programming is not complete until a “100”
OK status is received by the MCU with the MI–Bus voltage
at 5.0 V.
Overwrite–Bit Programming
involves the use of two
instructions. See Figure 11.
First Instruction
Have the MI–Bus continuously set at
12 V so as to have the MC33192 in the programming mode.
Programming can only be accomplished with the MI–Bus at
12 V.
The MCU serially enters “Logic Zeros” for the Push Field
Data bits D0, D1, D2 and D3 and a Logic “1” for D4 bit
followed by the programmed address bits A0, A1 and A2.
The MCU now waits 275
μ
s before starting the second
instruction. The total of the Pull time, Delay time, and Bus
Violation time (V) of the second instruction (150
μ
s, 275
μ
s
and 75
μ
s respectively) will cause the memory cell to be
energized for 500
μ
s. During the first 150
μ
s of this time, the
MCU is checking the Pull Field Data Bits for the status of bits
S2, S1 and S0 looking for the
programming code “110”
to
indicate complete activation of the memory cell.
Second Instruction
(MI–Bus remaining at 12 V)
The MCU repeats the first instruction outlined above until
the
programming OK code “100”
is sent back to the MCU
from the selected MC33192 indicating the overwrite–bit
protection to be programmed. If after eight repeat
instructions, the programming code “110” or the OK code
“100” is not generated four times in succession,
programming of the MC33192 has failed. If this occurs, the
Overwrite–Bit Programming sequence should be reviewed
and re–started from the beginning.
H–Bridge Output
The H–Bridge output drive circuit and associated
diagnostic encoder are shown in Figure 12. The H–Bridge
output uses internal diode clamps (D1, D2, D3, D4) to provide
transient protection of the output transistors necessary when
switching inductive loads associated with stepper motors.
Back EMF Detection
Three different Back EMF currents can occur depending
on whether the motor is running or manner in which it is being
stopped. Referring to Figure 12; When the Dir1 bit is set to
logic 0, the direction of current flow will be from VCC through
transistor Q2, Coil A (A1 to A2), and transistor Q4 to ground.
1)
Fast Decay
(when transistors Q1, Q2, Q3 and Q4 are
switched off).
When the current flowing in the coil is stopped by setting
the Inh1 bit to logic 0, the back EMF current will circulate
through the voltage supply (VCC) and diodes D1 and D3. At
that time, the voltage developed across the diode D1 is
detected by transistor Q6. The generated voltage pulse of Q6
is then encoded and sent, in the Pull–Field, to the
microprocessor.
2)
Slow Decay
(Q3 and Q4 are switched off)
When the current flowing in the coil is stopped by setting
the E bit to logic 0, the back EMF current will circulate through
the diode D1 and transistor Q2 which is already switched on.
3)
When Motor is Running
The rotational direction of the motor changes whenever
the Dir bit state is changed. When the Dir bit is changed from
a logic 0 to a logic 1, transistors Q2 and Q4 are switched off
and transistors Q1 and Q3 are switched on. At this time, the
back EMF current will circulate from ground through diodes
D1 and D3 to the voltage supply (VCC). In all cases, the back
EMF currents will be detected by transistors Q5 and Q6.
Figure 11. Address Programming Diagram
Instruction Number
1
2
3
MI–Bus Field
Push
Pull
Delay
V
V
Pull
Delay
V
Push
Push
Pull
550
μ
s
150
μ
s
275
μ
s
75
μ
s
550
μ
s
Address
Status Code
Overwrite–Bit
Status Code
MI–Bus Voltage
12V
5.0 V
12 V
5.0 V
Programming
Active
Finished
Finished
Strobe Pulse
OK
500
μ
s
Energy in
Memory Cell
500
μ
s
475
μ
s
t
“110”
“110”
“100”
“110”
“100”
“100”
150
μ
s
275
μ
s
75
μ
s
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相關代理商/技術參數 |
參數描述 |
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| MC33193 | 制造商:SPC Multicomp 功能描述:FUSE RESETTABLE SMD 0.75A 制造商:SPC Multicomp 功能描述:FUSE, PTC RESET, SMD, 16V, 750MA 制造商:SPC Multicomp 功能描述:RESETTABLE FUSE 60V 0.4A 制造商:SPC Multicomp 功能描述:FUSE, PTC RESET, 16V, 750mA, SMD; Holding Current:750mA; Tripping Current:1.5A; Initial Resistance Max:0.45ohm; Operating Voltage:16V; PTC Fuse Case:SMD; MSL:MSL 2A - 4 weeks; External Depth:0.65mm; Initial Resistance Min:0.11ohm ;RoHS Compliant: Yes |
| MC33193 | 制造商:SPC Multicomp 功能描述:PTC Resettable Fuse |
| MC33193D | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:AUTOMOTIVE DIRECTION INDICATOR |
| MC33193P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Automotive Direction Indicator |
| MC33194 | 制造商:SPC Multicomp 功能描述:FUSE RESETTABLE SMD 0.75A 制造商:SPC Multicomp 功能描述:FUSE, PTC RESET, SMD, 33V, 750MA 制造商:SPC Multicomp 功能描述:RESETTABLE FUSE 60V 0.5A 制造商:SPC Multicomp 功能描述:FUSE, PTC RESET, 33V, 750mA, SMD; Holding Current:750mA; Tripping Current:1.5A; Initial Resistance Max:1ohm; Operating Voltage:33V; PTC Fuse Case:SMD; MSL:MSL 2A - 4 weeks; External Depth:1.15mm; Initial Resistance Min:0.18ohm ;RoHS Compliant: Yes |
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