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I/O PORTS S3C2440A RISC MICROPROCESSOR
9-24
MISCELLANEOUS control register(MISCCR)
In Sleep mode, the data bus(D[31:0] or D[15:0] can be set as Hi-Z and Output ‘0’ state. But, because of the
characteristics of IO pad, the data bus pull-up resisters have to be turned on or off to reduce the power
consumption. D[31:0] pin pull-up resisters can be controlled by MISCCR register.
Pads related USB are controlled by this register for USB host, or for USB device.
Register Address R/W Description Reset Value
MISCCR 0x56000080 R/W Miscellaneous control register 0x10020
MISCCR Bit Description Reset Value
Reserved [24]
Reserve to 0. 0
Reserved [23]
Reserve to 0. 0
BATT_FUNC [22:20]
Battery fault function selection.
0XX: In nBATT_FLT=0, The system will be in reset status.
After reset, Change this bit to other values, this bit is only for
preventing from booting in Battery fault status.
10X: In sleep mode status, when nBATT_FLT=0, the system
will wake-up.
In normal mode, when nBATT_FLT=0, the Battery fault
interrupt will occur.
110: In sleep mode status, during nBATT_FLT=0, the
system will ignore all the wake-up events(the system will not
wake-up by wake-up source).
In normal mode, nBATT_FLT signal cannot affect the
system.
111: nBATT_FLT function disable.
000
OFFREFRESH [19]
0: Self refresh retain disable 1: Self refresh retain enable
When 1, After wake-up from sleep, The self-refresh will be
retained.
0
nEN_SCLK1 [18]
SCLK1 output enable
0: SCLK1 = SCLK 1: SCLK1 = 0
0
nEN_SCLK0 [17]
SCLK0 output enable
0: SCLK0 = SCLK 1: SCLK 0 = 0
0
nRSTCON [16]
nRSTOUT signal manual control
0: nRSTOUT signal level will be low(‘0’)
1: nRSTOUT singal level will be high(‘1’)
1
Reserved [15:14]
- 00
SEL_SUSPND1 [13]
USB Port 1 Suspend mode
0 = normal mode 1= suspend mode
0
SEL_SUSPND0 [12]
USB Port 0 Suspend mode
0 = normal mode 1= suspend mode
0