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: 98/133页
文件大小: 2615K
代理商: ST72141K2B3/XXX
Obsolete
Product(s)
- Obsolete
Product(s)
ST72141K2
67/133
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 & 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 24.
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 21.
70
T7
T6
T5
T4
T3
T2
T1
T0
70
ZP7
ZP6
ZP5
ZP4
ZP3
ZP2
ZP1
ZP0
70
ZC7
ZC6
ZC5
ZC4
ZC3
ZC2
ZC1
ZC0
70
DC7
DC6
DC5
DC4
DC3
DC2
DC1
DC0
70
DN7
DN6
DN5
DN4
DN3
DN2
DN1
DN0
70
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
70
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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