Hardware description
10.4 Input/output address areas
SIMATIC IPC127E
82
Operating Instructions, 01/2019, A5E44296915-AA
10.4.3
MMIO GPIO addresses for LEDs and battery monitoring
COMMUINTY_BASE = Bus 0 Device 0x0d Function 0 Reg. 0x10
GPIO North Community PORT ID = 0xC5
GPIO North West Community PORT ID = 0xC4
GPIO_PADBAR = COMMUNIT PORT ID << 16 + 0x500
GPO Reg = GPIO_ GPIO_Offset Bit [0] (LEDs)
GPI Reg = GPIO_ GPIO_Offset Bit [1] (Battery)
Example: Reg LED_USER1_RD_N_P1V8A = 0xD0C506A0
Function
Community Offset Direction
Description
LED
0x1A0
Out
Low enable red User LED1
LED
0x1A8
Out
Low enable green User LED1
LED
0x1C8
Out
Low enable red User LED2
LED
0x1D0
Out
Low enable green User LED2
LED
0x1E0
Out
Low enable red User LED3
LED
0x198
Out
Low enable green User LED3
LED
0x1C0
Out
BIOS boot indicator
Low= OS Control
High= in BIOS Boot Time
Battery
0x1E8
In
High= CMOS battery level below 2.75V
Battery
0x1B8
In
High= CMOS battery level below 2.5V
Battery
0x148
Out
High= enable CMOS Battery Check. Must be set
to 1 to read battery status