Propeller Manual

Table Of Contents

1: Introducing the Propeller Chip

Propeller Manual v1.1 · Page 19

many cogs are running at any given time. All of this is variable at run time, as controlled by

the application, including the internal clock speed.

Shutdown Procedure

When the Propeller goes into shutdown mode, the internal clock is stopped causing all cogs

to halt and all I/O pins are set to input direction (high impedance). Shutdown mode is

triggered by one of the three following events:

1) VDD falling below the brown-out threshold (≈2.7 VDC), when the brown-out circuit

is enabled,

2) the RESn pin going low, or

3) the application requesting a reboot (see the

REBOOT command, page 187).

Shutdown mode is discontinued when the voltage level rises above the brown-out threshold

and the RESn pin is high.