Phytec miniMODUL-537, Руководство по оборудованию

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miniMODUL-537
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PHYTEC Meßtechnik GmbH 1993 L-006e_2
6.6 General Remarks for RS-232 and RS-485 Interfaces ................ 39
6.6.1
RS-232 Interface ........................................................... 39
6.6.2 RS-485-Interface ........................................................... 40
6.7 Changing from RS-232 to RS-485 Standard.............................. 40
6.8 Program Example for the Serial Interface.................................. 41
6.8.1
Program for SERIAL0 .................................................. 41
6.8.2 Program for SERIAL1 .................................................. 42
7 RAM-Write-Protection and Battery Back-up................................ 43
7.1
Function of the Battery Buffering and Write Protection............ 44
7.2 Hints for the Utilization of the Battery Buffering ...................... 45
8 The External Watchdog-Timer and the Power-Fail-Option ........ 47
8.1
The External Watchdog-Timer................................................... 47
8.2 The Watchdog- and RESET-Time-Base .................................... 48
8.3 Application of the Power-Fail-Input (PFI .................................. 48
9 A/D Converter of the SAB80C537 ................................................... 49
10 The RESET-Signal ............................................................................ 51
11 The Optional Real-Time-Clock RTC72421 .................................... 53
11.1 Selection of the RTC .................................................................. 53
11.2 Programming of the Clock ......................................................... 54
11.3 The Standard Pulse-Option ........................................................ 54
11.4 Description of the Control-Bits .................................................. 55
Index............................................................................................................ 57
Index of Figures
Figure 1: Dimensions of the miniMODUL-537 .......................................... 2
Figure 2: Pin Connection ............................................................................. 7
Figure 3: The terminals of the miniMODUL-537 ..................................... 18
Figure 4: Jumper ........................................................................................ 31