參數資料
型號： MCZ33991EG
廠商： 飛思卡爾半導體(中國)有限公司
英文描述： Gauge Driver Integrated Circuit
中文描述： 儀表驅動集成電路
文件頁數： 29/36頁
文件大?。?/td> 481K
代理商： MCZ33991EG
Analog Integrated Circuit Device Data
Freescale Semiconductor
29
33991
TIMING DESCRIPTIONS AND DIAGRAMS
APPLICATION INFORMATION
10
VELR
Change the maximum velocity of the Gauge bits V8:V9 determine which gauge(s)
will change the maximum velocity bits V7:V0 determine the maximum velocity
position from the acceleration table.
Table 4
11
POS0R
Position Gauge 0 pointer
- Bits P0 11: P0 0: Desired Pointer Position
Table 5
Check SO for Out of Range V
PWR
- Bit ST6 logic 1 If so, then RTZ after valid V
PWR
Table 12
Check SO for over temperature bit ST0 logic 1 If so, then enable driver again. If ST0
continues to indicate over temperature, shut down Gauge 0.
If ST2 returns to normal, then reestablish the zero reference by RTZ command.
12
POS1R
Position Gauge 1 pointer
- Bits P1 11:P1 0: Desired Pointer Position.
Table 6
Check SO for Out-of-Range V
PWR
bit ST6 logic 1 If so, then RTZ after valid V
PWR
.
Table 12
Check SO for Over temperature bit ST1 logic 1 If so, then enable driver again. If
ST1 continues to indicate over temperature, then shut down Gauge 1. If ST1 returns
to normal, re-establish the zero reference by RTZ command.
13
POS0R
a.
POS0R.
Return the pointers close to zero position using
Table 5
b.
to the nearest full step prior to RTZ.
Move pointer position at least 24 microsteps CW
14
POS1R
Return the pointers close to zero position using POS1R.
Table 6
Move pointer position at least 24 microsteps CW to the nearest full step position prior
to RTZ.
Check SO to see if Gauge 0 has moved.
- Bit ST4 logic 1 If so then the gauge 0 has moved to the first microstep.
Table 12
15
PECR
Send null command to see if gauges have moved.
- Bits PE12
Table 3
Check SO to see if Gauge 0 (Gauge 1) has moved
- Bit ST4 (ST5) logic1 If so, then Gauge 0 (Gauge 1) has moved another microstep.
Keep track of movement and if 12 steps are finished, and both gauges are at a static
position, then RTZ. Otherwise repeat steps a) and b).
Table 12
16
RTZ
a.
using
RTZ command
bit RZ0 selects the gauge
bit RZ1 is used to enable or disable an RTZ
- Bits RZ3: RZ2 are used to select the RTZ accumulator bits that will clock out on
the SO pin.
Return one Gauge at a time to the zero stop
Tables 7-8
b.
the SO bits ST15:ST8. These will be used if characterizing the RTZ.
- Bits RZ3:RZ2 are used to select the bits.
Select the RTZ accumulator bits clocking out on
17
PECR
a.
command to monitor SO bit ST2
- Bit PE12 is the null command.
Check the Status of the RTZ by sending the null
Table 3
Is ST2 logic 0 If not then gauge 0 still returning. Null command should be resent.
Table 12
Table 18. 33991 Setup, Configuration, & Usage Example (continued)
Step #
Command
Description
Reference
Figure #
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