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SPEAR1340 Datasheet(PDF) 113 Page - STMicroelectronics |
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SPEAR1340 Datasheet(HTML) 113 Page - STMicroelectronics |
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113 / 200 page  SPEAr1340 Pin description Doc ID 023063 Rev 4 113/200 MCIF_IORDY CF: IORDY, -DDMARDY, DSTROBE Except in Ultra DMA mode, this input signal may be used as IORDY. When in ultra DMA mode, DMA write is active; this signal (- DDMARDY) is asserted by the device to indicate that the device is read to receive Ultra DMA data-in bursts. The device may negate - DDMARDY to pause an ultra DMA transfer. When ultra DMA mode DMA read is active, this signal is the data out strobe (DSTROBE) generated by the device. Both the rising and falling edge of DSTROBE cause data to be latched by the host. The device may stop generating DSTROBE edges to pause an ultra DMA data-out burst ID19 MCIF_nCS1 CF: -CS1 -CS1 is used to select the alternate status register and the device control register. While -DMACK is asserted, this signal is held negated OE21 MCIF_nDMACK_nWP CF: -DMACK A DMA acknowledge signal that is asserted by the host in response to DMARQ to initiate DMA transfers. When DMA operations are not active, the card ignores the -DMACK signal, including a floating condition. xD: Write protect OA20 MCIF_SD_CMD SD: Command /response line IO E17 MCIF_LEDS All modes Monitors bus activity when data transfer occurs. Caution: do not remove the card while it is being accessed OA16 1. For more details on the use of each signal, please refer to Table 7: MCIF multiplexing scheme. Table 23. Connectivity- MCIF signals description (continued) Signal name Description(1) Type Ball Table 24. Connectivity - KBD signals description Signal name Signal type Description Ball Keyboard GPIO Keyboard GPIO KBD_ROW5 OD IO Strobe 5, active low GPIO. Input/Output A11 KBD_ROW4 OD IO Strobe 4, active low E12 KBD_ROW3 OD IO Strobe 3, active low D12 KBD_ROW2 OD IO Strobe 2, active low C12 KBD_ROW1 OD IO Strobe 1, active low B12 KBD_ROW0 OD IO Strobe 0, active low A12 KBD_COL5 I IO Pressed key5, active low AE18 KBD_COL4 I IO Pressed key4, active low A10 |
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