参数资料
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: 18/40页
文件大小: 5332K
代理商: MC33976
Analog Integrated Circuit Device Data
Freescale Semiconductor
18
33976
FUNCTIONAL DEVICE OPERATION
COMMUNICATION MEMORY MAPS AND REGISTER DESCRIPTIONS
.
Table 12. RTZCR SI Register Assignment
The bits in
Table 12
are
write-only
.
RC12:RC11 (D12:D11) — These bits, along with RC3:RC0
(D3:D0) and RC4 (D4), determine the full step time and,
therefore, the rate at which the pointer will move during an
RTZ event. The values of D12:D11 determine the multiplier
(M) used in equation (1) (refer to page
17
).
RC12:RC11 = M; default value = 00
00 = 1
01 = 2
10 = 4
11 = 8
RC10:RC5 (D10:D5) — These bits determine the value
preloaded into the RTZ integration accumulator to adjust the
detection threshold. Values range from -1 (00000000) to -
1009 (11111111) as shown in
Table 14
, the default value =
000000.
RC4 (D4) — This bit determines the RTZ blanking time
(
blanking
(
t)
). The default value = 0
0 = 512
μ
s
1 = 768
μ
s
RC3:RC0 (D3:D0) — These bits, along with RC12:RC11
(D12:D11) and RC4 (D4), determine the time variables used
to calculate the full step times with equations (1) or (2)
illustrated above. RC3:RC0 determines the
t time. The
t
values range from 0 (0000) to 61.440 ms (1111) and are
shown in
Table 13
. The default
t is 0 (0011).
Note
Equation (2) (refer to page
17
) is only used to
calculate the full step time if RC3:RC0 = 0000. Use
equation (1) for all other combinations of RC3:RC0.
Address 101
Bits
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Read
Write
RC12
RC11
RC10
RC9
RC8
RC7
RC6
RC5
RC4
RC3
RC2
RC1
RC0
Table 13. RTZCR Full Step Time
RC3
RC2
RC1
RC0
t (ms)
0
0
0
0
0
0
0
0
1
4.096
0
0
1
0
8.192
0
0
1
1
12.288
0
1
0
0
16.384
0
1
0
1
20.480
0
1
1
0
24.576
0
1
1
1
28.672
1
0
0
0
32.768
1
0
0
1
36.864
1
0
1
0
40.960
1
0
1
1
45.056
1
1
0
0
49.152
1
1
0
1
53.248
1
1
1
0
57.344
1
1
1
1
61.440
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