ARM POWER MANAGER ISSUES

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B1) Ability to shut off 1.5v power supply (board)

B2) Ability to shut off 3.686MHz oscillator (board)

B3) Make sure all relevant pins are brought out (BATT_FAULT,VDD_FAULT, PWR_EN, GPIO<1:0>, RESET_OUT) (board)

B4) Ability to shut off Xilinx oscillator. How long to restart?

 

P1) Disable interrupts from peripherals in sleep mode (Xilinx, codec, etc).  Capability exists.

P2) Ability to reprogram Proxim after standby – probably just toggling Tx_Rx is sufficient.

P3) Wake up on what??

 

Times for Power Manager:

Sleep Mode:

                Shutdown:             3 steps, ea 30.517us = 91.553us = roughly 100us

                Wakeup:                10ms ramp-up timer
                                              150ms if 3.6864Mz oscillator was disabled in shutdown
                                              ? to take DRAMs out of self-refresh mode

                                               from 10+ to160+ ms 

Idle Mode:

                ??? (fast – 10s of us probably)

Intercom Submodes:

Idle                                         same as ARM idle
Sleep 1                                   ARM sleep, 3.6864MHz oscillator on
Sleep 2                                   ARM sleep, 3.6864MHz oscillator off
Sleep 3                                   ARM sleep, Xilinx oscillator off
Sleep 4                                   ARM sleep, Xilinx oscillator off, radio in standby
Sleep 5                                   ARM sleep, Xilinx power off, radio power off
Off                                          main power off

Preliminary numbers (at 3.0v):

Power-up                               800ma ; 2.4w                        Proxim in Tx
Program running                     600ma ; 1.2w                        interactive mode, Proxim in Rx
Proxim standby                      350ma ; 1.05w                      interactive mode
ARM idle                               ??
ARM sleep                            400ma ; 1.2w                        Proxim in Rx
                                              150ma ; 450mw                    Proxim in standby
                                              100ma ; 300mw                    Proxim in standby, Xilinx clock stopped