1.4 Clocks

SmartFusion2 devices have two on-chip RC oscillators and up to two crystal oscillators for generating clocks for the on-chip resources and logic in the FPGA fabric, as listed in the following table.

RC Oscillators:

  • 1 MHz RC oscillator
  • 50 MHz RC oscillator

Crystal Oscillators:

  • Main crystal oscillator
  • Auxiliary (RTC) crystal oscillator

All IGLOO2 devices and the M2S050 SmartFusion2 device have a main crystal oscillator. They do not have an auxiliary (RTC) crystal oscillator.

Table 1-11. Clock Circuit

Resource

SmartFusion2 SoC Part Number

IGLOO2 Part Number

M2S005

M2S010

M2S025

M2S050

M2S150

M2GL005

M2GL010

M2GL025

M2GL050

M2GL150

RC Oscillators

2

2

2

2

2

2

2

2

2

2

On-Chip Oscillators

Crystal Oscillators

2

2

2

1

2

1

1

1

1

1