---
name: "icepll"
section: "1"
platform: "linux"
package: "fpga-icestorm"
version: "0~20250207git7fbf8c0+dfsg1-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/icepll"
---

# icepll(1)

compute PLL parameters for iCE40

## NAME

**icepll - compute PLL parameters for iCE40**

## SYNOPSIS

```
  icepll [options]
```

## DESCRIPTION

**Computes PLL divisors and VCO frequency, given an input frequency** **and desired output frequency.**

## OPTIONS

- **-i \<input\_freq\_mhz\>**

  **PLL Input Frequency (default: 12 MHz)**

- **-o \<output\_freq\_mhz\>**

  **PLL Output Frequency (default: 60 MHz)**

- **-S**

  **Disable SIMPLE feedback path mode**

## AUTHOR

**This manual page was written by Sebastian Kuzminsky \<seb@highlab.com\>** **for the Debian project (and may be used by others).**