Table 15-11. mmc_resto register, 7 mmc_rdto register, Table 15-12. mmc_rdto register – Intel PXA26X User Manual
Page 539
Intel® PXA26x Processor Family Developer’s Manual
15-27
MultiMediaCard Controller
15.5.7
MMC_RDTO Register
The MMC_RDTO register determines the length of time that the controller waits after a command
before it turns on the time-out error if data has not been received (see
). The length of
time before a time-out occurs is measured in increments of 256 20-MHz periods and can be
calculated as follows:
It is the software’s responsibility to calculate the value for READ_TO. The default value is 0xffff,
which corresponds to 838.848 ms.
Table 15-11. MMC_RESTO Register
Physical Address
4110_0014
MMC_RESTO Register
MMC
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Reserved
RES_TO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
Bits
Name
Description
31:7
—
Reserved
6:0
RES_TO
RESPONSE TIME-OUT:
Number of MMC clocks before a response time-out
Time-out Delay
MMC_RDTO[READ_TO]
(
)
256
(
)
×
20MHz
------------------------------------------------------------------------------------------
MMC_RDTO[READ_TO]
(
)
128
(
)
×
10
7
------------------------------------------------------------------------------------------sec
=
=
Table 15-12. MMC_RDTO Register
Physical Address
4110_0018
MMC_RDTO Register
MMC
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Reserved
READ_TO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Bits
Name
Description
31:16
—
Reserved
15:0
READ_TO
READ TIME-OUT:
Specifies the length of time before a data read time-out