And what exactly is FSB in Sam460ex/lite/cr/le?
FSB (front-side bus) was originally meant for CPU - Northbridge bus.
AMCC460ex is SoC with integrated memory controller - so traditional "FSB" is inside CPU.
460ex have four internal buses according to datasheet:
-Processor Local Bus (PLB), 128bit, 133-200 MHz - from this clock is derived CPU core and memory clocks. Also DDR, PCIe and PCI are connected there via High Bandwith segment. This bus is nearest to traditional FSB definition.
-On-chip Peripheral Bus (OPB), 32bit address, 32bit data, 66-100MHz
-Advanced High-performance Bus (AHB), 32bit address, 32bit data, 66-200MHz, synchronized with PLB - USB and single SATA (Sam460ex) is connected
-Device Control Register bus (DCR), 32bit data, 10bit addr
So again, what is FSB frequency in this CPU context?
The nearest frequeny to U-boot reported FSB clock ( 50MHz ) is SysClk input, which should have nominally 66-100 MHz.
Maybe is better to ask directly A-Cube what does FSB means here.[ Edited by sailor 01.01.2023 - 19:26 ]
AmigaOS3: Amiga 1200
AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, AmigaOneX1000
MorphOS: Efika 5200b, Pegasos I, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad