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| 型号： | MC33976 |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 英文描述： | Dual Gauge Driver with Configurable Response Time(带可设置响应时间的双标尺驱动器) |
| 中文描述： | 双计驱动器，可配置的响应时间（带可设置响应时间的双标尺驱动器） |
| 文件页数： | 16/40页 |
| 文件大小： | 5332K |
| 代理商： | MC33976 |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
16
33976
FUNCTIONAL DEVICE OPERATION
COMMUNICATION MEMORY MAPS AND REGISTER DESCRIPTIONS
The bits in
Table 9
are
write-only
.
HE0 12 (D12) — This bit is used to disable the damping
(i.e., hold counts) for Gauge 0 (1 = Damping disabled;
0 = Damping enabled).
P0 11:P0 0 (D11:D0) — Desired pointer position of
Gauge 0. Pointer positions can range from 0
(000000000000) to position 4095 (111111111111). For a
step motor requiring 12 microsteps per degree of pointer
movement, the maximum pointer sweep is 341.25
°.
.
Table 10. Gauge 1 Position Register (POS1R)
The bits in
Table 10
are
write-only
.
HE1 12 (D12) — This bit is used to disable the damping
(i.e., hold counts) for Gauge 1 (1 = Damping disabled;
0 = Damping enabled).
P1 11:P1 0 (D11:D0) — Desired pointer position of
Gauge 1. Pointer positions can range from 0
(000000000000) to position 4095 (111111111111). For a
step motor requiring 12 microsteps per degree of pointer
movement, the maximum pointer sweep is 341.25
°
(4095
÷ 12)
.
Address 100 — Gauge Return to Zero Register (RTZR)
Gauge Return to Zero Register (RTZR) (refer to
Table 11
,
page
16
) is written to return the gauge pointers to the zero
position. During an RTZ event, the pointer is returned to zero
using full steps, where only one coil is driven at any point in
time. The back electromotive force (EMF) signal present on
the non-driven coil is integrated and its results are stored in
an accumulator.
A logic [1] written to bit RZ1 enables a Return to Zero for
Gauge 0 if RZ0 is logic [0], and Gauge 1 if RZ0 is logic [1],
respectively. Similarly, a logic [0] written to bit RZ1 disables a
Return to Zero for Gauge 0 when RZ0 is logic [0], and
Gauge 1 when RZ0 is logic [1], respectively.
Bits D12:D5 and D3:D2 must be at logic [0] for valid RTZR
commands.
Bit RZ4 is used to enable an unconditional RTZ event. A
logic [0] results in a typical RTZ event, automatically
providing a Stop when a stall condition is detected. A logic [1]
will result in RTZ movement, causing a Stop if a logic [0] is
written to bit RZ0. This feature is useful during development
and characterization of RTZ requirements.
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.
Table 9. Gauge 0 Position Register (POS0R)
Address 010
Bits
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Read
–
–
–
–
–
–
–
–
–
–
–
–
–
Write
HE012
P0 11
P0 10
P0 9
P0 8
P0 7
P0 6
P0 5
P0 4
P0 3
P02
P01
P0 0
Address 011
Bits
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Read
–
–
–
–
–
–
–
–
–
–
–
–
–
Write
HE112
P1 11
P1 10
P1 9
P1 8
P1 7
P1 6
P1 5
P1 4
P1 3
P1 2
P1 1
P1 0
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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