Multimedia Card Registers
www.ti.com
18.5.1.16 SD_PSTATE Register (offset = 224h) [reset = 0h]
SD_PSTATE is shown in Figure 18-52 and described in Table 18-35.
The Host can get the status of the Host controller from this 32-bit read only register.
Figure 18-52. SD_PSTATE Register
31 30 29 28 27 26 25 24
Reserved CLEV
R-0h R-0h
23 22 21 20 19 18 17 16
DLEV WP CDPL CSS CINS
R-0h R-0h R-0h R-0h R-0h
15 14 13 12 11 10 9 8
Reserved BRE BWE RTA WTA
R-0h R-0h R-0h R-0h R-0h
7 6 5 4 3 2 1 0
Reserved DLA DATI CMDI
R-0h R-0h R-0h R-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 18-35. SD_PSTATE Register Field Descriptions
Bit Field Type Reset Description
31-25 Reserved R 0h
24 CLEV R 0h mmc_cmd line signal level.
This status is used to check the mmc_cmd line level to recover from
errors, and for debugging.
The value of this register after reset depends on the mmc_cmd line
level at that time.
0x0 = The mmc_cmd line level is 0.
0x1 = The mmc_cmd line level is 1.
23-20 DLEV R 0h mmc_dat
[3:0] line signal level mmc_dat3 equal to or greater than bit 23.
mmc_dat2 equal to or greater than bit 22.
mmc_dat1 equal to or greater than bit 21.
mmc_dat0 equal to or greater than bit 20.
This status is used to check mmc_dat line level to recover from
errors, and for debugging.
This is especially useful in detecting the busy signal level from
mmc_dat0 .
The value of these registers after reset depends on the mmc_dat
lines level at that time.
19 WP R 0h Write Protect.
MMC/SD/SDIO1 only.
SDIO cards only.
This bit reflects the write protect input pin (SDWP) level.
The value of this register after reset depends one the protect input
pin (SDWP) level at that time.
0x0 = If SD_CON[8] WPP is cleared to 0 (default), the card is write
protected, otherwise the card is not write protected.
0x1 = If SD_CON[8] WPP is cleared to 0 (default), the card is not
write protected, otherwise the card is write protected.
3416
Multimedia Card (MMC) SPRUH73H–October 2011–Revised April 2013
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated
To Next Page
Loading...
Need help?
General
