Pepper Computer RS485, RS232 user manual SMTselIn Syntax, Description, Input

SMART I/O User’s Manual Chapter 2 SMART-BASE

2.6.2SMTselIn Syntax

error_code SMTselIn(u_int8 mode);

Description

This function selects one of four possible counter/timer input (TIN) configu- rations utilizing the 6MHz internal counter/timer clock.

Input

u_int8 mode

This represents the four input configurations. They are:

MODE00 The Simple I/O/TIN input pin carries the Simple I/O and the CLK and prescaler are used. The prescaler is decremented on the falling transition of the clock pin; the 24-bit counter is decremented, rolls over or is loaded from the counter preload registers when the prescaler rolls over from $00 to $1F.

MODE01 The Simple I/O/TIN serves as a timer input and the CLK and prescaler are used. The prescaler and counter are decremented as in MODE00.

MODE10 The Simple I/O/TIN pin serves as a timer input and the prescaler is used. The prescaler is decremented following the rising transition of the TIN pin after being synchronized with the internal clock. The 24-bit counter is decremented, rolls over or is loaded from the counter preload registers when the prescaler rolls over from $00 to $1F.

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