參數(shù)資料
型號(hào)： MC56F8245MLD
廠商： Freescale Semiconductor
文件頁數(shù)： 30/88頁
文件大小： 0K
描述： DSC 48K FLASH 60MHZ 44-LQFP
標(biāo)準(zhǔn)包裝： 160
系列： 56F8xxx
核心處理器： 56800E
芯體尺寸： 16-位
速度： 60MHz
連通性： CAN，I²C，LIN，SCI，SPI
外圍設(shè)備： LVD，POR，PWM，WDT
輸入/輸出數(shù)： 35
程序存儲(chǔ)器容量： 48KB（24K x 16）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 3K x 16
電壓 - 電源 (Vcc/Vdd)： 3 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x12b，D/A 1x12b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 105°C
封裝/外殼： 44-LQFP
包裝： 管件
MC56F825x/MC56F824x Digital Signal Controller, Rev. 3
General System Control Information
Freescale Semiconductor
36
5
General System Control Information
5.1
Overview
This section discusses power pins, reset sources, interrupt sources, clock sources, the system integration module (SIM), ADC
synchronization, and JTAG/EOnCE interfaces.
5.2
Power Pins
VDD, VSS and VDDA, VSSA are the primary power supply pins for the device. The voltage source supplies power to all on-chip
peripherals, I/O buffer circuitry, and internal voltage regulators. The device has multiple internal voltages to provide regulated
lower-voltage sources for the peripherals, core, memory, and on-chip relaxation oscillators.
Typically, at least two separate capacitors are across the power pins to bypass the glitches and provide bulk charge storage. In
this case, a bulk electrolytic or tantalum capacitor, such as a 10 F tantalum capacitor, should provide bulk charge storage for
the overall system, and a 0.1 F ceramic bypass capacitor should be located as near to the device power pins as is practical to
suppress high-frequency noise. Each pin must have a bypass capacitor for optimal noise suppression.
VDDA and VSSA are the analog power supply pins for the device. This voltage source supplies power to the ADC, PGA, and
CMP modules. A 0.1 F ceramic bypass capacitor should be located as near to the device VDDA and VSSA pins as is practical
to suppress high-frequency noise. VDDA and VSSA are also the voltage reference high and voltage reference low inputs,
respectively, for the ADC module.
5.3
Reset
Resetting the device provides a way to start processing from a known set of initial conditions. During reset, most control and
status registers are forced to initial values, and the program counter is loaded from the reset vector. On-chip peripheral modules
are disabled and I/O pins are initially configured at the reset status shown in Table 5 on page 18.
The MC56F825x/MC56F824x has the following sources for reset:
Power-on reset (POR)
Partial power-down reset (PPD)
Low-voltage detect (LVD)
External pin reset (EXTR)
Computer operating properly loss of reference reset (COP_LOR)
Computer operating properly time-out reset (COP_CPU)
X:0xFF FF91–X:0xFF FF90
OBMSK (32 bits)
Breakpoint Unit Mask Register 2
X:0xFF FF8F
Reserved
X:0xFF FF8E
OBCNTR
EOnCE Breakpoint Unit Counter
X:0xFF FF8D
Reserved
X:0xFF FF8C
Reserved
X:0xFF FF8B
Reserved
X:0xFF FF8A
OESCR
External Signal Control Register
X:0xFF FF89 –X:0xFF FF00
Reserved
Table 13. EOnCE Memory Map
Address
Register Abbreviation
Register Name
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