ST7MC2S6 STMicroelectronics, ST7MC2S6 Datasheet - Page 146
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ST7MC2S6
Manufacturer Part Number
ST7MC2S6
Description
8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC,BRUSHLESS MOTOR CONTROL, 5 TIMERS, SPI, LINSCI(TM)
Manufacturer
STMicroelectronics
Datasheet
1.ST7MC1K4.pdf
(309 pages)
Specifications of ST7MC2S6
Hdflash Endurance
100 cycles, data retention
Clock Sources
crystal/ceramic resonator oscillators and by-pass for external clock, clock security system.
Four Power Saving Modes
Halt, Active-Halt, Wait and Slow
Main Clock Controller With
Real time base, Beep and Clock-out capabilities
Two 16-bit Timers With
2 input captures, 2 output compares, external clock input, PWM and pulse generator modes
8-bit Pwm Auto-reload Timer With
2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector
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ST7MC1xx/ST7MC2xx
MOTOR CONTROLLER (Cont’d)
10.6.5 Functional Description
The MTC can be split into five main parts as
shown in the simplified block diagram in
Each of these parts may be configured for different
purposes:
■
■
■
■
■
10.6.6 Input Detection Block
This block can operate in Position sensor mode, in
sensorless mode or in Speed Sensor mode. The
mode is selected via the SR bit in the MCRA reg-
ister and the TES[1:0] bits in MPAR register (refer
146/309
1
INPUT DETECTION BLOCK with a comparator,
an input multiplexer and an incremental encoder
interface, which may work as:
– A BEMF zero-crossing detector
– A Speed Sensor Interface
The DELAY MANAGER with an 8/16-bit timer
and an 8x8 bit multiplier, which may work as a:
– 8-bit delay manager
– Speed Measurement unit
The
measurement window generator, a mode
selector and a current comparator.
The CHANNEL MANAGER with the PWM
multiplexer, polarity programming, deadtime
insertion
capability and emergency HiZ configuration
input.
The THREE-PHASE PWM GENERATOR with
12-bit free-running counter and repetition
counter.
PWM
and
MANAGER,
high
frequency
including
Figure
chopping
77.
a
to
gram is shown in
sor/Sensorless modes (TES[1:0] = 00) and in
ure 88
10, 11).
10.6.6.1 Input Pins
The MCIA, MCIB and MCIC input pins can be
used as analog or as digital pins.
– In sensorless mode, the analog inputs are used
– In sensor mode, the analog inputs are used to
– In speed sensor mode (e.g. tachogenerator), the
Due to the presence of diodes, these pins can per-
manently support an input current of 5mA. In sen-
sorless mode, this feature enables the inputs to be
connected to each motor phase through a single
resistor.
A multiplexer, programmed by the IS[1:0] bits in
the MPHST register selects the input pins and
connects them to the control logic in either sensor-
less or tachogenerator mode. In encoder mode, it
is mandatory to connect sensor digital outputs to
the MCIA and MCIB pins.
to measure the BEMF zero crossing and to de-
tect the end of demagnetization if required.
get the Hall sensor information.
inputs are used as digital pins. When using an
AC tachogenerator, a small external circuit may
be needed to convert the incoming signal into a
square wave signal which can be treated by the
MTC.
Table 35
for the Speed Sensor mode (TES[1:0] = 01,
for set-up information). The block dia-
Figure 78
for the Position Sen-
Fig-
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