50.12.36 SDMMC Maximum Current Capabilities Register

Note: The user should adjust the Maximum Current Capabilities register so that it matches board design. The preset values can be modified only if the Capabilities Write Enable (CAPWREN) bit is set to 1 in SDMMC_CACR.
Name: SDMMC_MCCAR
Offset: 0x48
Reset: 0x00000000
Property: Read/Write

Bit 3130292827262524 
          
Access  
Reset  
Bit 2322212019181716 
 MAXCUR18V[7:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 
Bit 15141312111098 
 MAXCUR30V[7:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 
Bit 76543210 
 MAXCUR33V[7:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 

Bits 23:16 – MAXCUR18V[7:0] Maximum Current for 1.8V

This field indicates the maximum current capability for 1.8V voltage. This value is meaningful only if V18VSUP is set to 1 in SDMMC_CA0R. Reading MAXCUR18V at 0 means that the user must get information via another method.

Imax mA = 4 × MAXCURR 18 V

Bits 15:8 – MAXCUR30V[7:0] Maximum Current for 3.0V

This field indicates the maximum current capability for 3.0V voltage. This value is meaningful only if V30VSUP is set to 1 in SDMMC_CA0R. Reading MAXCUR30V at 0 means that the user must get information via another method.

Imax mA = 4 × MAXCURR 30 V

Bits 7:0 – MAXCUR33V[7:0] Maximum Current for 3.3V

This field indicates the maximum current capability for 3.3V voltage. This value is meaningful only if V33VSUP is set to 1 in SDMMC_CA0R. Reading MAXCUR33V at 0 means that the user must get information via another method.

Imax mA = 4 × MAXCURR 33 V