参数资料
型号: ST72T141K2MARE
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO34
封装: 0.300 INCH, LEAD FREE, PLASTIC, SOP-34
文件页数: 95/131页
文件大小: 3096K
代理商: ST72T141K2MARE
ST72141K2-Auto
66/131
MOTOR CONTROLLER (Cont’d)
8.1.7 Register Description
TIMER COUNTER REGISTER (MTIM)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = T[7:0]: MTIM Counter Value.
These bits contain the current value of the 8-bit up
counter.
CAPTURE Zn-1 REGISTER (MZPRV)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = ZP[7:0]: Previous Z Value.
These bits contain the previous captured BEMF
value (ZN-1).
CAPTURE Zn REGISTER (MZREG)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = ZC[7:0]: Current Z Value.
These bits contain the current captured BEMF val-
ue (ZN).
COMPARE Cn+1 REGISTER (MCOMP)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = DC[7:0]: Next Compare Value.
These bits contain the compare value for the next
commutation (CN+1).
DEMAGNETIZATION REGISTER (MDREG)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = DN[7:0]: D Value.
These bits contain the compare value for software
demagnetization (DN) and the captured value for
hardware demagnetization (DH).
AN WEIGHT REGISTER (MWGHT)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = AN[7:0]: A Weight Value.
These bits contain the AN weight value for the mul-
tiplier. In autoswitched mode the MCOMP register
is automatically loaded with:
when a Z event occurs.
(*) depending on the DCB bit in the MCRA regis-
ter.
PRESCALER AND SAMPLING REGISTER
(MPRSR)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:4 = SA[3:0]: Sampling Ratio.
These bits contain the sampling ratio value for cur-
rent mode. Refer to Table 23.
Bits 3:0 = ST[3:0]: Step Ratio.
These bits contain the step ratio value. It acts as a
prescaler for the MTIM timer and is auto incre-
mented/decremented with each R+ or R- event.
Refer to Table 20.
7
0
T7
T6
T5
T4
T3
T2
T1
T0
7
0
ZP7
ZP6
ZP5
ZP4
ZP3
ZP2
ZP1
ZP0
7
0
ZC7
ZC6
ZC5
ZC4
ZC3
ZC2
ZC1
ZC0
7
0
DC7
DC6
DC5
DC4
DC3
DC2
DC1
DC0
7
0
DN7
DN6
DN5
DN4
DN3
DN2
DN1
DN0
7
0
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
7
0
SA3
SA2
SA1
SA0
ST3
ST2
ST1
ST0
Zn x MWGHT
32(d)
or
Z
N
-1 x MWGHT
32(d)
(*)
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