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ConnectCore ? f or ? i .M X 5 1 ?
– SD Memory Card Specification Version 2.0: supports High-Capacity SD Memory Cards
– SDIO Card Specification Version 2.0
??? Supports
1, 4, or 8 bit MMC modes and 1bit or 4 bit SD and SDIO modes
– Card bus clock frequency up to 52 MHz
– Up to 416 Mbps of data transfer for MMC cards in 8-bit mode
– Up to 200 Mbps of data transfer for SD/SDIO cards in 4-bit mode
– Allows cards to interrupt the host in 1-bit and 4-bit SDIO modes, also supports
interrupt period
The following table shows the memory card signals available on the module connectors:
Signal
Card Detect (CD #)
CLK
CMD
Memory
Card 1
√
√
√
Memory
Card 2
√
√
Memory
Card 3
√
√
Memory
Card 4
√
√
LCTL
√
WP#
√
√
DATA3 - DATA0
DATA7 - DATA4
√
√
√
√
√
√
√
PWM
The ConnectCore for i.MX51 module provides two PWM interfaces. These PWM interfaces
share the output pad in the i.MX51 CPU with the I 2 C bus used on the module for the
accelerometer. In order to use the PWM signals the I 2 C bus must be disabled.
The main features of the PWM interface are the following:
??? 16-bit
up-counter with clock source selection
??? 4
× 16 FIFO to minimize interrupt overhead
??? 12-bit
??? Sound
??? Active
prescaler for division of clock
and melody generation
high or active low configured output
??? Can
be programmed to be active in low power and debug modes
??? Interrupts
? ? 2011 ? Digi ? International, ? Inc.
at compare and rollover
???? ? 49
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