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LS1022A bảng dữ liệu(PDF) 37 Page - Freescale Semiconductor, Inc

tên linh kiện LS1022A
Giải thích chi tiết về linh kiện  TWR-LS1021A Reference Manual
PDF  71 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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LS1022A bảng dữ liệu(HTML) 37 Page - Freescale Semiconductor, Inc

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Architecture
TWR-LS1021A Reference Manual, Rev. 0
2-22
Freescale Semiconductor
2.16
SDHC interface
The LS1021A / LS1020A SDHC interface supports a large variety of devices, both in terms of width as
well as the ability to use special signals to accelerate data transfer:
•
MMC cards, 1x, 4x or 8x wide, 3.3 V only
•
Legacy MMC cards: 1x, 4x or 8x wide, 3.3 V only
•
SDHC card, 1x or 4x wide, 3.3 V only
To handle all these options, TWR-LS1021A systems feature a full-size connector which a variety of
adapter cards install.
NOTE
SDHC_WP and SDHC_CD_N are multiplexed with I2C2 signals, so
default they are not supported.
Figure 2-16 shows the overall connections of the SDHC portion
Figure 2-16. SDHC architecture
Table 2-15. SPI configuration
Configuration
Signal
Controls
Value
Description
cfg_spi2_lcd
SW: SW3[6]
0
LCD/LPUART
1
SPI2
REG: 0x0A
0
SPI2
1
LPUART1
cfg_ifc_spi1
SW: SW2[7]
0
SPI1
1
IFC (or I2C3)



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