ML60852A Datasheet, PDF (49/81 Pages) OKI electronic componets – USB Device Controller

1Semiconductor
FEDL60852A-03
ML60852A
System Control Register (SYSCON)
Address
Type
Access type
0 x 2F
Bit map
Read/Write
D7
After a hardware reset 0
After a bus reset
Definition
0
D6 D5 D4 D3 D2 D1 D0
0
0
0
0
0
0
0
The previous value is retained
Software reset
(R/W) (sereset)
Power-down mode
(R/W) (power)
0 = Power saving is not
done in the suspend
mode.
1 = Power saving is done
in the suspend mode.
EP Mode (R/W) (ep_mod)
0 = EP0 to EP5
1 = EP0 to EP4
Pull-up control (R/W) (plup)
Remote wakeup (R/W)
PLL Enable (pll_enable)
PLL Multiplication factor selection (fsel)
Software reset: Write-only bit. Even when this bit is read out, it will be fixed at “0”. A system reset is
executed when a “1” is written in this bit. This is functionally equivalent to a hardware reset.
However, this bit itself will always remain “0”.
Power-down mode: Read/Write bit. When this bit is “0”, the oscillations will not be stopped even during the
suspend mode. When this bit is made “1”', the oscillations will be stopped in the suspend
mode and the device goes into the power save mode.
EP mode:
Read/Write bit. The 6EP mode is selected when this bit is 0 and the 5EP mode is selected
when this bit is “1”.
Pull-up control: The content of this bit becomes valid when the ADSEL pin is “L”. When the ADSEL pin is
“L”, the internal switch becomes ON and the ALE pin is pulled up to the Vcc level if this bit is
“1”. On the other hand, if the ADSEL pin is “L” and also this bit is “0”, the internal switch is
made OFF and the ALE pin goes into the high impedance state.
Remote wakeup: A remote wakeup is executed when a “1” is written in this bit. However, this bit itself will
always remain “0”.
PLL enable:
This bit is for enabling the internal PLL. The internal PLL cannot be used when this bit is “0”.
The signal input to the XIN pin becomes the source oscillations for the internal circuits.
The internal PLL can be used when this bit is “1”.
PLL multiplication
factor selection: The frequency multiplication factor is 4 when this bit is “0”, and will be 8 when this bit is
“1”.
(The source oscillator frequency will be 12 MHz in the 4x mode and will be 6 MHz in the 8x
mode.)
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