參數(shù)資料
型號: 21889
英文描述: ?lanSC310 Evaluation Board User's Manual
中文描述: ?lanSC310評估板用戶手冊
文件頁數(shù): 57/124頁
文件大?。?/td> 1229K
代理商: 21889
élanSC310 Microcontroller Evaluation Board User’s Manual
3-9
1
D: Force PMU to Suspend Mode
The keyboard is disabled in this mode. Pressing the Suspend/Resume key or
toggling the ACIN pin returns the system to High Speed PLL mode.
C: Test Battery Level & ACIN Pins
This menu item shows how the battery level and ACIN pins are tied to the PMU.
Pin BL1 can be used to force the CPU to run at 9.2 Mhz. Pin BL2 can be used to
transition the PMU into Sleep mode. Pin BL4 can be used to transition the PMU
into Suspend mode. Each of the above transitions can be enabled or disabled by
selecting item "A: Change BL Transition Masks", highlighting the appropriate
field, and using the "+" and "–" keys to enable or disable the transitions. There is
also an option to enable/disable a transition message. If enabled, a Transition
message is displayed as the élanSC310 microcontroller transitions from Low
Speed to Doze mode, prompting the user to press a key before the system transitions
to Sleep or Suspend mode.
The box on the top right of the screen displays the current state of the BL and ACIN
pins. Status for the BL4 pin is not directly readable by the élanSC310. On the
élanSC310 microcontroller evaluation board, the state of the BL pins and ACIN
pins are controlled by the Red 8 bank DIP switch SW4. Switches 4–7=BL1–BL4;
Switch 8=ACIN.
ACIN must be set to 0 in order for any of the BL pins to cause a PMU state change.
Once a BL pin is used to cause a PMU state change, setting ACIN to 1 (active)
wakes up the system and returns the PMU to High Speed PLL mode.
X: Restore PMU State and Exit to DOS
This option restores the élanSC310 microcontroller’s index registers to the value
they were set to when the program was entered, and returns the user to the DOS
prompt.
Z: Leave Current PMU Values and Exit to DOS
This option leaves the élanSC310 microcontroller’s index registers set at their
current value, and returns the user to the DOS prompt.
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