Schweitzer Engineering Laboratories SEL-2020 - Configuration Register; Global Elements; Global Status Register

9-6 Database Date Code 20010518
SEL-2020 Instruction Manual
Global Status Register
0000000 000000000
└───┬───┘│││││││││
│ ││││││││└──+15 V power supply failure
│ │││││││└──── -15 V power supply failure
│ ││││││└────── Unused
│ │││││└──────── RAM failure
│ ││││└────────── ROM failure
│ │ │ │ └──────────── EEPROM failure
│ │ │ └────────────── Flash failure
│ │ └──────────────── Set failure
│ └────────────────── Battery failure
└──────────────────────── Unused
See STATUS command for complete discussion of failure types.
Configuration Register
0000 0 000 10 10 000 1
└──┬─┘└┬┘ └─┬─┘ └┬─┘ └┬─┘ └─┬─┘ └┬┘
│││││ │└──┬ 1 = Modem
│││││ │ └0 = No Modem
│││││ │
│││││ └───────┬ 100 = I/O Board
│││││ └000 = No I/O Board
│││││
│││││ ┌01 = 256 k RAM
│ │ │ │ └─────────────┤ 10 = 512 k RAM
││││ └11=1MbRAM
││││
││││ ┌01 = 16 k EEPROM
│ │ │ └──────────────────┤ 10 = 32 k EEPROM
││ │ └11 = 64 k EEPROM
││ │
││ │ ┌000=0kFlash
││ │ │001 = 256 k Flash
│ │ └───────────────────────┤ 010=1MbFlash
││ │011 = 1.28 Mb Flash
││ └100=2MbFlash
││
│ └────────────────────────────┬ 0 = 16 MHz CPU
│└1 = 20 MHz CPU
│
└───────────────────────────────── Not Used
Global Elements
Table 9.3 shows global elements. Table 9.4 lists definitions for global elements.