Siemens TC65 Specifications download pdf (Page 49)

TC65 Hardware Interface Description

Confidential / Released

TC65_HD_V02.000 Page 49 of 120 08.06.2006

3.6.2 Timing of the CTSx Signal in CYCLIC SLEEP Mode 7

Figure 11 illustrates the CTSx signal timing in CYCLIC SLEEP mode 7 (CFUN=7).

Figure 11: Timing of CTSx signal (if CFUN= 7)

With regard to programming or using timeouts, the UART must take the varying CTSx

inactivity periods into account.

3.6.3 Timing of the RTSx Signal in CYCLIC SLEEP Mode 9

In SLEEP mode 9 the falling edge of RTSx can be used to temporarily wake up the ME. In

this case the activity time is at least the time set with AT^SCFG="PowerSaver/Mode9/

Timeout",<psm9to> (default 2 seconds). RTSx has to be asserted for at least a dedicated

debounce time in order to wake up the ME. The debounce time specifies the minimum time

period an RTSx signal has to remain asserted for the signal to be recognized as wake up

signal and being processed. The debounce time is defined as 8*4.615 ms (TDMA frame

duration) and is used to prevent bouncing or other fluctuations from being recognized as

signals. Toggling RTSx while the ME is awake has no effect on the AT interface state, the

regular hardware flow control via CTS/RTS is unaffected by this RTSx behaviour.

Figure 12: Timing of RTSx signal (if CFUN = 9)

2 s

CTSx

AT interface disabled

1 character

Last character

Beginning of power saving

0.9...2.7 s

AT interface enabled

2 s

CTSx

AT interface disabled

Wake up of ME

AT interface enabled

RTSx

Debounce Time

37 ms

Power saving

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 119 120

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Siemens TC65 Specifications Page 49