ST7MC2S6 STMicroelectronics, ST7MC2S6 Datasheet - Page 220
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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)
COMPARE PHASE U PRELOAD REGISTER
HIGH (MCPUH)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = CPUH[7:0] Most Significant Byte of
phase U preload value
COMPARE PHASE U PRELOAD REGISTER
LOW (MCPUL)
Read/Write Read/Write (except bits 2:0)
Reset Value: 0000 0000 (00h)
Bits 7:5 = CPUL[7:3] Low bits of phase U preload
value.
Bits 2:0 = Reserved.
COMPARE 0 PRELOAD REGISTER HIGH
(MCP0H)
Read/Write (except bits 7:4)
Reset Value: 0000 1111 (0Fh)
Bits 7:4 = Reserved.
Bits 3:0 = CP0H[3:0] Most Significant Bits of Com-
pare 0 preload value.
220/309
CPUL7 CPUL6 CPUL5 CPUL4 CPUL3
CPUH
7
-
7
7
7
-
CPUH
6
-
CPUH
5
-
CPUH
CP0H3
4
CPUH
CP0H2
3
CPUH
2
-
CP0H1
CPUH
1
-
CP0H0
CPUH
0
0
0
0
-
COMPARE 0 PRELOAD REGISTER LOW
(MCP0L)
Read/Write
Reset Value: 1111 1111 (FFh)
Bits 7:0 = CP0L[7:0] Low byte of Compare 0
preload value.
Note 1: The 16-bit Compare registers MCMPOx,
MCMPUx, MCMPVx, MCMPWx MSB and LSB
parts have to be written sequentially before being
taken into account when an update event occurs;
refer to
Note 2: The CPB, HDM, SDM, OS2 bits in the
MCRB and the bits OE[5:0] are marked with *. It
means that these bits are taken into account at the
following commutation event (in normal mode) or
when a value is written in the MPHST register
when in direct access mode. For more details, re-
fer to the description of the DAC bit in the MCRA
register. The use of a Preload register allows all
the registers to be updated at the same time.
Warning: Access to Preload registers
Special care has to be taken with Preload regis-
ters, especially when using the ST7 BSET and
BRES instructions on MTC registers.
For instance, while writing to the MPHST register,
you will write the value in the preload register.
However, while reading at the same address, you
will get the current value in the register and not the
value of the preload register.
Excepted for three-phase PWM generator’s regis-
ters, all preload registers are loaded in the active
registers at the same time. In normal mode this is
done automatically when a C event occurs, how-
ever in direct access mode (DAC bit=1) the
preload registers are loaded as soon as a value is
written in the MPHST register.
Caution: Access to write-once bits
Special care has to be taken with write-once bits in
MPOL and MDTG registers; these bits have to be
accessed first during the set-up. Any access to the
other bits (not write-once) through a BRES or a
BSET instruction will lock the content of write-once
bits (no possibility for the core do distinguish indi-
vidual bit access: Read/write internal signal acts
on a whole register only). This protection is then
only unlocked after a processor hardware reset.
CP0L7 CP0L6 CP0L5 CP0L4 CP0L3 CP0L2 CP0L1 CP0L0
7
section 10.6.10.4 on page 201
for details.
0
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