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UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
419 of 1269
NXP Semiconductors
UM10503
Chapter 20: LPC43xx SD/MMC interface
10
SEND_AUTO_STOP_
CCSD
Send auto stop ccsd. NOTE: Always set send_auto_stop_ccsd and
send_ccsd bits together; send_auto_stop_ccsd should not be set
independent of send_ccsd. When set, the SD/MMC interface
automatically sends internallygenerated STOP command (CMD12) to
CE-ATA device. After sending internally-generated STOP command,
Auto Command Done (ACD) bit in RINTSTS is set and generates
interrupt to host if Auto Command Done interrupt is not masked. After
sending the CCSD, the SD/MMC interface automatically clears
send_auto_stop_ccsd bit.
0
0
Clear this bit if the SD/MMC controller does not reset the bit.
1
Send internally generated STOP after sending CCSD to CE-ATA
device.
11
CEATA_DEVICE_
INTERRUPT _STATUS
CEATA device interrupt status. Software should appropriately write to
this bit after power-on reset or any other reset to CE-ATA device.
After reset, usually CE-ATA device interrupt is disabled (nIEN = 1). If
the host enables CE-ATA device interrupt, then software should set
this bit.
0
0
Interrupts not enabled in CE-ATA device (nIEN = 1 in ATA control
register)
1
Interrupts are enabled in CE-ATA device (nIEN = 0 in ATA control
register)
15:12
-
Reserved
-
16
CARD_VOLTAGE_A0
Controls the state of the SD_VOLT0 pin. SD/MMC card voltage
control is not implemented.
0
17
CARD_VOLTAGE_A1
Controls the state of the SD_VOLT1 pin. SD/MMC card voltage
control is not implemented.
0
18
CARD_VOLTAGE_A2
Controls the state of the SD_VOLT2 pin. SD/MMC card voltage
control is not implemented.
0
23:19
-
Reserved.
0
24
-
Reserved. Always write this bit as 0.
0
25
USE_INTERNAL_DMAC
SD/MMC DMA use.
0
0
The host performs data transfers through the slave interface
1
Internal DMA used for data transfer
31:26
-
Reserved
-
Table 297. Control Register (CTRL, address 0x4000 4000) bit description
Bit
Symbol
Value
Description
Reset
value