Dave Embedded Systems ARM Cortex-A9 MPCore, Руководство по оборудованию

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A x e l H a r d w a r e M a n u a l v . 1 . 0 . 4
Pin name Conn.
Pin Function Notes
MMC/SD/SDIO
card
SD3_CMD J3.5 CMD line
SD3_DATA0 J3.11 DATA0 line in all
modes Also used to detect
busy state
SD3_DATA1 J3.13 DATA1 line in
4/8-bit mode Also used to detect
interrupt in 1/4-
bit mode
SD3_DATA2 J3.15 DATA2 line or
Read Wait in 4-bit
mode Read Wait in 1-bit
mode
SD3_DATA3 J3.17 DATA3 line in
4/8-bit mode or
configured as
card detection pin May be configured as
card detection
pin in 1-bit mode
SD3_DATA4 J3.19 DATA4 line in
8-bit mode, not
used
in other modes
SD3_DATA5 J3.21 DATA5 line in
8-bit mode, not
used
in other modes
SD3_DATA6 J3.23 DATA6 line in
8-bit mode, not
used
in other modes
SD3_DATA7 J3.25 DATA7 line in
8-bit mode, not
used
in other modes
SD3_RESET J3.7 Card hardware
reset signal,
active
LOW
SD3_VSELECT J1.98
J2.4
IO power voltage
selection signal
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