參數(shù)資料
型號: MCF5274CVM166
廠商: Freescale Semiconductor
文件頁數(shù): 44/44頁
文件大小: 0K
描述: IC MCU 32BIT 166MHZ 256-MAPBGA
標準包裝: 90
系列: MCF527x
核心處理器: Coldfire V2
芯體尺寸: 32-位
速度: 166MHz
連通性: EBI/EMI,以太網(wǎng),I²C,SPI,UART/USART,USB
外圍設備: DMA,WDT
輸入/輸出數(shù): 69
程序存儲器類型: ROMless
RAM 容量: 64K x 8
電壓 - 電源 (Vcc/Vdd): 1.4 V ~ 1.6 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 256-LBGA
包裝: 托盤
Design Recommendations
MCF5275 Integrated Microprocessor Family Hardware Specification, Rev. 4
Freescale Semiconductor
9
5
Design Recommendations
5.1
Layout
Use a 4-layer printed circuit board with the VDD and GND pins connected directly to the power
and ground planes for the MCF5275.
See application note AN1259 System Design and Layout Techniques for Noise Reduction in
MCU-Based Systems.
Match the PC layout trace width and routing to match trace length to operating frequency and board
impedance. Add termination (series or therein) to the traces to dampen reflections. Increase the
PCB impedance (if possible) keeping the trace lengths balanced and short. Then do cross-talk
analysis to separate traces with significant parallelism or are otherwise "noisy". Use 6 mils trace
and separation. Clocks get extra separation and more precise balancing.
5.2
Power Supply
33uF, 0.1
μF, and 0.01 μF across each power supply
VSSPLL
I
K16
L13
VSS
I
A1, A10, A16,
E5, E12, F6,
F11, G7:10,
H7:10, J1,
J7:10, K7:10,
L6, L11, M5,
N16, R7, T1,
T16
F7, F8, G6:9,
H6:9, J7, J8
OVDD
I
E6:8, F5, F7, F8,
G5, G6, H5, H6,
J11, J12, K11,
K12, L9, L10,
L12, M9:11
E5:7, F5, F6,
H10, J9, J10,
K8:10
VDD
I
D8, H13, K4, N8 D6, G5, G12, L7
SD_VDD
I
E9:11, F9, F10,
F12, G11, G12,
H11, H12, J5,
J6, K5, K6, L5,
L7, L8, M6, M7,
M8
E8:10, F9, F10,
G10, H5, J5, J6,
K5:7
1 Refers to pin’s primary function. All pins which are configurable for GPIO have a pullup enabled in GPIO
mode with the exception of PBUSCTL[7], PBUSCTL[4:0], PADDR, PBS, PSDRAM.
2 If JTAG_EN is asserted, these pins default to Alternate 1 (JTAG) functionality. The GPIO module is not
responsible for assigning these pins.
Table 2. MCF5274 and MCF5275 Signal Information and Muxing (continued)
Signal Name
GPIO
Alternate1
Alternate2 Dir.1
MCF5274
MCF5275
256 MAPBGA
MCF5274L
MCF5275L
196 MAPBGA
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