Siemens ERTEC200

CTRL_STAT1 R/W Addr.: 0x4000_2004 Default: 0x0000_0000

Description Control/status register 1. Configuration and control bits for Timer No. 1.

Bit No. Name Description

0 Run/xStop *) Stop/start of timer:

0: Timer is stopped

1: Timer is running

Note: If this bit = 0, the timer interrupt is inactive (0) and the status bit (Bit 5) is

reset (0).

1 Load Trigger=Load the timer with the reload register value:

0: Not relevant

1: Timer is loaded with the value of the reload register

(irrespective of Bit 0=Run/xStop)

While this bit can be read back, it only has an effect at the instant of writing.

Writing a value of 1 to this bit is sufficient to trigger the timer; a 0/1 edge is not

needed.

2 Reload mode *) Reload mode (continuous mode) of the timer.

0: Timer stops at value 00000000h

1: Timer is loaded with the reload register value when the timer value is

00000000h

and the timer continues running

3 Reserved Not relevant (can be read/write-accessed)

4 Reserved Not relevant (read=0)

5 Status Timer status (writing is ignored)

0: Timer has not expired

1: Timer has expired (count is 0 and Run/xStop=Bit 0=1)

Note: This bit can only be read as 1 if Run/xStop (Bit 0) is active (1).

6 Cascading Cascading of timer

0: Not relevant

1: Cascading of timers 0 and 1

31-7 Reserved Not relevant (read=0)

Important note: The bits designated with *) are relevant to Timer 0 as well if the timers are cascaded!

RELD0 R/W Addr.: 0x4000_2008 Default: 0x0000_0000

RELD1 R/W Addr.: 0x4000_200C Default: 0x0000_0000

Description Reload registers 0 to 1. Reload value for timers 0 to 1.

Bit No. Name Description

31:0 Reload [31:0] Reload value of timer

CTRL_PREDIV R/W Addr.: 0x4000_2010 Default: 0x0000_0000

Description Control register for the two prescalers

Bit No. Name Description

0 Run/xStop_V0 Stop/start of prescaler 0:

0: Prescaler 0 is stopped

1: Prescaler 0 is running

1 Load_V0 Trigger = loading of prescaler 0 with the reload register value:

0: Not relevant

1: Prescaler 0 is loaded with the value of the reload register

While this bit can be read back, the trigger only has an effect

at the instant of writing. The prescaler is loaded independently of the status

of Run/xStop_V0.

2 Run/xStop_V1 Stop/start of prescaler 1:

0: Prescaler 1 is stopped

1: Prescaler 1 is running

3 Load_V1 Trigger = loading of prescaler 1 with the reload register value:

0: Not relevant

1: Prescaler 1 is loaded with the value of the reload register

While this bit can be read back, the trigger only has an effect

at the instant of writing. The prescaler is loaded independently of the status

of Run/xStop_V1.

31-4 Reserved Not relevant (read=0)

Remark about the prescalers: The current counter value of the prescalers cannot be read. In addition, there are no status

bits for the prescalers indicating when the counter state is 0. The prescalers always run cyclically (in Reload mode).

Technical data subject to change Version 1.1.0