Datasheet

Table Of Contents
40.8.11 Power Control Register
Name:  PCR
Offset:  0x29
Reset:  0x0E
Property:  -
Bit 7 6 5 4 3 2 1 0
SDBVSEL[2:0] SDBPWR
Access
R/W R/W R/W R/W
Reset 1 1 1 0
Bits 3:1 – SDBVSEL[2:0] SD Bus Voltage Select
By setting this bit, the user selects the voltage level for the card. Before setting this register, the user must
check the Voltage Support in CA0R. If an unsupported voltage is selected, the system does not supply
the bus voltage.
Value Name Description
0x0-0x4
Reserved Reserved
0x5
1V8 1.8 Volt (Typical)
0x6
3V0 3.0 Volt (Typical)
0x7
3V3 3.3 Volt (Typical)
Bit 0 – SDBPWR SD Bus Power
This bit is automatically cleared by the peripheral if the card is removed. If this bit is cleared, the
peripheral stops driving CMD and DAT[7:0] (tri-state) and drives CK to low level.
SAM D5x/E5x Family Data Sheet
SD/MMC Host Controller ...
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 1337