参数资料
型号: ST72141K2B3/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
封装: 0.400 INCH, PLASTIC, SDIP-32
文件页数: 89/133页
文件大小: 2615K
代理商: ST72141K2B3/XXX
Obsolete
Product(s)
- Obsolete
Product(s)
ST72141K2
59/133
MOTOR CONTROLLER (Cont’d)
Table 21. Step Frequency/Period Range
Table 22. Modes of Accessing MTIM Timer-Related Registers
Step Ratio Bits
ST[3:0]
Maximum
Step Frequency
Minimum
Step Frequency
Minimum
Step Period
Maximum
Step Period
0000
23.5 kHz
7.85 kHz
42.5
μs
127.5
μs
0001
11.7 kHz
3.93 kHz
85
μs
255
μs
0010
5.88 kHz
1.96 kHz
170
μs
510
μs
0011
2.94 kHz
980 Hz
340
μs1.02 ms
0100
1.47 kHz
490 Hz
680
μs2.04 ms
0101
735 Hz
245 Hz
1.36 ms
4.08 ms
0110
367 Hz
123 Hz
2.72 ms
8.16 ms
0111
183 Hz
61.3 Hz
5.44 ms
16.32 ms
1000
91.9 Hz
30.7 Hz
10.9 ms
32.6 ms
1001
45.9 Hz
15.4 Hz
21.8 ms
65.2 ms
1010
22.9 Hz
7.66 Hz
43.6 ms
130 ms
1011
11.4 Hz
3.83 Hz
87 ms
261 ms
1100
5.74 Hz
1.92 Hz
174 ms
522 ms
1101
2.87 Hz
0.958 Hz
349 ms
1.04 s
1110
1.43 Hz
0.479 Hz
697 ms
2.08 s
1111
0.718 Hz
0.240 Hz
1.40 s
4.17 s
State of MCRA Register Bits
Access to MTIM Timer Related Registers
RST bit
SWA bit
MOE bit
Mode
Read Only Access
Read / Write Access
0
Configuration Mode
MTIM, MZPRV, MZREG, MCOMP,
MDREG, ST[3:0]
0
1
Switched Mode
MTIM, MZPRV,
MZREG, ST[3:0]
MCOMP, MDREG,
RMI bit of MISR:
0: No action
1: Decrement ST[3:0]
RPI bit of MISR:
0: No action
1: Increment ST[3:0]
0
1
0
Emergency Stop
MTIM, MZPRV, MZREG, MCOMP,
MDREG, ST[3:0]
0
1
Autoswitched Mode
MTIM, MZPRV,
MZREG, MCOMP,
ST[3:0]
MDREG,RMI, RPI bit of MISR:
Set by hardware, (increment ST[3:0])
Cleared by software
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