NCN5121
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54
Internal Device−Specific Registers
In total 4 device-specific register are available:
• Watchdog Register (0x00)
• Analog Control Register 0 (0x01)
• Analog Control Register 1 (0x02)
• Analog Status Register 0 (0x03)
• Revision ID Register (0x05)
Watchdog Register
The Watchdog Register is located at address 0x00 and can be used to enable the watchdog and set the watchdog time.
Table 14. WATCHDOG REGISTER
ExtWatchdogCtrl (ExtWR)
Address Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0x00
Access R/W R/W R/W R/W R/W R/W R/W R/W
Reset 0 0 0 0 1 1 1 1
Data WDEN - - - WDT
Table 15. WATCHDOG REGISTER PARAMETERS
Parameter Value Description Info
WDEN
0 Disable
Enables/disables the watchdog
p22
1 Enable
WDT
0000 33 ms
Defines the watchdog time. The watchdog needs to be re-enabled (WDEN)
within this time or a watchdog event will be triggered.
0001 66 ms
0010 98 ms
0011 131 ms
0100 164 ms
0101 197 ms
0110 229 ms
0111 262 ms
1000 295 ms
1001 328 ms
1010 360 ms
1011 393 ms
1100 426 ms
1101 459 ms
1110 492 ms
1111 524 ms
Remark: Bit 4 … 6 are reserved.
Analog Control Register 0
The Analog Control Register 0 is located at address 0x01 and can be used to disable the V20V and the DC2 regulator, to
disable the XCLK-pin, to enable the transmit trigger signal and to set the 20 V LDO current limit.
Table 16. ANALOG CONTROL REGISTER 0
Analog Control Register 0 (AnaCtrl0)
Address Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0x01
Access R/W R/W R/W R/W R/W R/W R/W R/W
Reset 0 1 1 1 0 1 0 0
Data − V20VEN DC2EN XCLKEN TRIGEN V20VCLIMIT
