Peripheral Simulation

For Atmel AT91SAM7X128 — Real-time Timer

Simulation support for this peripheral or feature is comprised of:

• Dialog boxes which display and allow you to change peripheral configuration.

These simulation capabilities are described below.

Real-time Timer Dialog

The Real-time Timer Dialog shows the current state of the on-chip Real-time Timer. You can change Real-time Timer settings using the controls in this dialog.

Mode

• RTT_MR (Mode Register) holds the parameters that control the timer. They are:
• RTPRES (Real-time Prescaler Value) holds the number of SCLK periods (16-bits) required to increment the real-time timer.
• RTTRST (Real-time Timer Restart) reloads and restarts the clock divider with a the new programmed value, and resets the 32-bit counter.
• RTTINCIEN (Real-time Timer Increment Interrupt Enable) allows the RTTINC bit to trigger an interrupt.
• ALMIEN (Alarm Interrupt Enable) allows the ALMS bit to trigger an interrupt.

Alarm

• RTT_AR (Alarm Register) holds the ALMV value.
• ALMV (Alarm Value) defined the 32-bit alarm value compared to the Real-time Timer.

Value

• RTT_VR (Value Register) holds the CRTV value.
• CRTV (Current Real-time Value) displays the current 32-bit real-time value.

Status

• RTT_SR (Status Register) holds the ALMS and the RTCINC values.
• ALMS (Real-time Alarm Status) is set if an alarm has occurred since the last read of RTT_SR.
• RTCINC (Real-time Timer Increment) is set if the Real-time Timer has been incremented since the last read of RTT_SR.