S5PV210_HARDWARE DESING GUIDE REV 1.0
75
3.3. Circuit design without level shifter
Power
IP
VDD_EXT0 VDD_EXT1 VDD_EXT2
SD/MMC MMC0,
MMC1
MMC2
MMC3
SPI SPI0 SPI1 SPI1
Uart
UART0, UART1
UART2, UART3
I2C I2C0 I2C1,
I2C2
MMC 4channel, SPI 2channel, Uart 4channel and I2C 3channel has different Power domains
Ex) 2 MMC channel , 2Uart channel
¸
1 SPI channel, 1 I2C channel : 1.8V,
2MMC channel, 2Uart channel, 1 SPI channel, 2 I2C channel : 3.0V
=> VDD_EXT0: 1.8V MMC0,1(2channel), SPI0(1channel), Uart0.1(2channel), I2C0 (1channel)
VDD_EXT1: 3.0V MMC2(1channel), Uart2,3 (2channel), I2C1, 2(2channel)
VDD_EXT2: 3.0V MMC3(1channel), SPI1(1channel)
Ex) 4 MMC channel , 4Uart channel
¸
2 SPI channel, 3 I2C channel : 3.0V,
=> VDD_EXT0, VDD_EXT1, VDD_EXT2 : 3.0V