Milkymist One Power On Off Sequence
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Normal RC2 Power On Off Sequence
Booted: A manuscript of illustrating Milkymist One RC2 0x1a board. It is collected from Milkymist One RC2 Collective Waveforms Captured While Power On/Off.
How do un-booted conditions generated?
Known bug on H/W and Solutions
Un-booted: MM1 RC2 0x2c board; CH1 = DONE(triggered source), CH2 = PROGRAM_B; triggered at rising edge by switching on an AC 110V from the input of AC(EU) DC adapter WN10B-050; without reset ic, no 82nF besides R60, power cycling : On(D2 lights flash) -> Off -> On(D2 slight lights eventually), Monitor Milkymist logo doesn't show up. 100m sec/div
Un-booted: MM1 RC2 0x2c board; CH1 = DONE(triggered source), CH2 = PROGRAM_B; triggered at rising edge by switching on an AC 110V from the input of AC(EU) DC adapter WN10B-050; with reset ic connected to PROGRAM_B, no 82nF besides R60, power cycling : On(D2 lights flash) -> Off -> On(D2 lights off eventually), Monitor Milkymist logo shows up but doesn't enter Flicknoise control panel screen.100m sec/div
Booted: MM1 RC2 0x2c board; CH1 = DONE(triggered source), CH2 = PROGRAM_B; triggered at rising edge by switching on an AC 110V from the input of AC(EU) DC adapter WN10B-050; with reset ic connected to PROGRAM_B, no 82nF besides R60, power cycling : On(D2 lights flash) -> Off -> On(D2 lights off eventually), Monitor Milkymist logo shows up and enters Flicknoise control panel screen.250m sec/div
Un-booted: MM1 RC2 0x2c board; CH1 = DONE(triggered source), CH2 = U9 RP#; triggered at rising edge by switching on an AC 110V from the input of AC(EU) DC adapter WN10B-050; with reset ic connected to PROGRAM_B, No 82nF, power cycling : On(D2 slight flash) -> Off -> On(D2 lights On eventually), Monitor Milkymist logo shows up but doesn't enter Flicknoise control panel screen.100m sec/div
Booted: MM1 RC2 0x2c board; CH1 = DONE(triggered source), CH2 = U9 RP#; triggered at rising edge by switching off an AC 110V from the input of AC(EU) DC adapter WN10B-050; with reset ic connected to PROGRAM_B, no 82nF besides R60, power cycling : On(D2 lights flash) -> Off -> On(D2 lights off eventually), Monitor Milkymist logo shows up and also enters Flicknoise control panel screen.250m sec/div
NOR FLASH Reset Specifications
Asserting RP# during a system reset is important with automated program/erase devices because systems typically expect to read from flash memory when coming out of reset. If a CPU reset occurs without a flash memory reset, proper CPU initialization may not occur. This is because the flash memory may be providing status information, instead of array data as expected. Connect RP# to the same active low reset signal used for CPU initialization. Also, because the device is disabled when RP# is asserted, it ignores its control inputs during power-up/down. Invalid bus conditions are masked, providing a level of memory protection. See Reset Operation Waveforms in JS28F256J3F105[1].
1, tVCCPH: Min. 300us, VCC Power valid to RP# de-assertion (high) 2, tPLPH: Min. 100ns, RP# pulse width low
Reference
Links
Operating Voltages of Milkymist One's Key Parts
Milkymist One RC2 Collective Waveforms Captured While Power On Off
Xilinx UG380 Spartan-6 FPGA Configuration User Guide
