参数资料
型号: MC56F8025MLD
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP44
封装: 10 X 10 MM, 1.40 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLIANT, MS-026BCB, LQFP-44
文件页数: 14/161页
文件大小: 2160K
代理商: MC56F8025MLD
56F8035/56F8025 Data Sheet, Rev. 6
110
Freescale Semiconductor
Figure 6-28 Sources of RESET Functional Diagram (Test modes not included)
POR resets are extended 64 OSC_CLK clocks to stabilize the power supply and clock source. All resets
are subsequently extended for an additional 32 OSC_CLK clocks and 64 system clocks as the various
internal reset controls are released. Given the normal relaxation oscillator rate of 8MHz, the duration of a
POR reset from when power comes on to when code is running is 28S. An external reset generation
circuit may also be used. A description of how these resets are used to initialize the clocking system and
system modules is included in Section 6.7.
6.7 Clocks
The memory, peripheral and core clocks all operate at the same frequency (32MHz maximum), with the
exception of the peripheral clocks for quad timers TMRA and TMRB and the PWM, which have the option
to operate at 3X system clock. The SIM is responsible for clock distributions.
While the SIM generates the ADC peripheral clock in the same way it generates all other peripheral clocks,
the ADC standby and conversion clocks are generated by a direct interface between the ADC and the
OCCS module.
EXTENDED_POR
JTAG
Memory
Subsystem
Peripherals
56800E
CORE_RST
Delay 32
sys clocks
OCCS
CLKGEN_RST
PERIP_RST
Delay 32
sys clocks
pulse shaper
SW Reset
pulse shaper
Delay 32
OSC_CLK
Clock
pulse shaper
POR
Power-On
Reset
(active low)
External
RESET IN
(active low)
RESET
Delay 64
OSC_CLK
Clock
Delay blocks assert immediately and
deassert only after the programmed
number of clock cycles.
COMBINED_RST
COP_LOR
(active low)
COP_TOR
(active low)
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