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
Read Wait in 4-bit
mode mode
SD2_DATA3 J1.140 DATA3 line in
4/8-bit mode or
configured as
card detection pin
May be configured as
card detection
pin in 1-bit mode
SD2_DATA4 J2.20 DATA4 line in
8-bit mode, not
used
in other modes
SD2_DATA5 J2.22 DATA5 line in
8-bit mode, not
used
in other modes
SD2_DATA6 J2.24 DATA6 line in
8-bit mode, not
used
in other modes
SD2_DATA7 J2.26 DATA7 line in
8-bit mode, not
used
in other modes
SD2_LCTL J1.84 LED control used
to drive an
external LED
Active high Fully controlled by
the driver
Optional output
SD2_VSELECT J1.108
J1.114 IO power voltage
selection signal
SD2_WP J1.76 Card write protect
detect If not used(for the
embedded
memory), tie low to
indicate it's not
write protected.
7.12.3 MMC/SD/SDIO3
The following table describes the interface signals:
Pin name Conn.
Pin Function Notes
SD3_CLK J3.1 Clock for
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