Preliminary
HSMMC CONTROLLER
S3C2451X RISC MICROPROCESSOR
21-44
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
NORMAL INTERRUPT STATUS REGISTER
The
Normal Interrupt Status Enable
affects reads of this register, but
Normal Interrupt Signal Enable
does not
affect these reads. An interrupt is generated when the Normal Interrupt Signal Enable is enabled and at least one
of the status bits is set to 1. For all bits except
Card Interrupt
and
Error Interrupt
, writing 1 to a bit clear it; writing
to 0 keeps the bit unchanged. More than one status can be cleared with a single register write. The
Card
Interrupt
is cleared when the card stops asserting the interrupt; that is, when the Card Driver services the
interrupt condition.
Register Address R/W
Description
Reset
Value
NORINTSTS0 0X4AC00030 ROC/RW1C
Normal
Interrupt Status Register (Channel 0)
0x0
NORINTSTS1 0X4A800030 ROC/RW1C
Normal
Interrupt Status Register (Channel 1)
0x0
Name Bit
Description
Initial
Value
STAERR [15]
Error Interrupt
If any of the bits in the
Error Interrupt Status
register are set, then this bit is
set. Therefore the Host Driver can efficiently test for an error by checking this
bit first. This bit is read only. (ROC)
‘0’ = No Error
’1’ = Error
0
STAFIA3
[14]
FIFO SD Address Pointer Interrupt 3 Status (RW1C)
‘0’ = Occurred
’1’ = Not Occurred
0
STAFIA2
[13]
FIFO SD Address Pointer Interrupt 2 Status (RW1C)
‘0’ = Occurred
’1’ = Not Occurred
0
STAFIA1
[12]
FIFO SD Address Pointer Interrupt 1 Status (RW1C)
‘0’ = Occurred
’1’ = Not Occurred
0
STAFIA0
[11]
FIFO SD Address Pointer Interrupt 0 Status (RW1C)
‘0’ = Occurred
’1’ = Not Occurred
0
STARWAIT
[10]
Read Wait Interrupt Status (RW1C)
‘0’ = Read Wait Interrupt Occurred
’1’ = Read Wait Interrupt Not Occurred
Note : After checking response for the suspend command, release Read Wait
interrupt status manually if BS = 0
0
STACCS
[9]
CCS Interrupt Status (RW1C)
Command Complete Singal Interrupt Status bit is for CE-ATA interface mode.
‘0’ = CCS Interrupt Occurred
’1’ = CCS Interrupt Not Occurred
0
STACARDI
NT
[8]
Card Interrupt
Writing this bit to 1 does not clear this bit. It is cleared by resetting the SD
card interrupt factor. In 1-bit mode, the Host Controller shall detect the
Card
Interrupt
without SD Clock to support wakeup. In 4-bit mode, the card
interrupt signal is sampled during the interrupt cycle, so there are some
sample delays between the interrupt signal from the SD card and the interrupt
0