S3C6410_CIRCUIT DESIGN GUIDE REV 1.00
29. SPI
29.1 EXTERNAL LOADING CAPACITANCE
S3C6410X has two SPI controllers. Both controllers should follow the external loading capacitance below.
Output capacitance must be lower than 10pF at the channel 0, channel1.
29.2 SPI MAXIMUM SPEED
The maximum frequency Master Tx/Master Rx/Slave Rx/Slave Tx(CPHA=0) is up to 50MHz.
The maximum frequency Slave Tx is up to 20MHz(CPHA=1).
29.3 SUPPORTED VOLTAGE RANGE
SPI interface voltage range is 2.5V~3.6V.
SPI channel 0 voltage follow by VDD_EXT and channel 1 voltage follow by VDD_MMC.
29.4 MUXED PIN LIMITATION
MMC Channel 2, I2S and SPI Channel 1 are can't use at the same time. Refer to below table.
GPIO Name
Function 1
Function 2
Function3
Function4 Function
5
Function
6
GPC4
SPI MOSI[1]
MMC CMD2
I2S_V40 DO[0]
EINT
Input
Output
GPC5
SPI CLK[1]
MMC CLK2
I2S_V40 DO[1]
EINT
Input
Output
83
Summary :
GPIO Name Function 1 Function 2 Function3 Function4 Function 5 Function 6 GPC4 SPI MOSI[1] MMC CMD2 I2S_V40 DO[0] EINT Input Output GPC5 SPI CLK[1] MMC CLK2 I2S_V40 DO[1] EINT Input Output 83
Tags :
spi,channel,function,oltage,follow,mmc,output,capacitance,maximum,loading,rxslae,input,external