MEN BL51E, User Manual

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Hardware/Software Interface
20BL51E00 E2

2020-03-27 Page 85
Note: If the word has value
0xFFFF
, the date field has not been programmed.
5.1.2 SMBus Configuration Registers
5.1.2.1 Ignition, GPS, User LED SMB Register (
0x40
)
Table 71. SMB Register (
0x40
)
Bit Field Description
15:9 Year Year since 1990 in binary format. This allows a range from 1990
to 2117.
8:5 Month Month in binary format (1 to 12)
4:0 Day Day of month in binary format (1 to 31)
Bit 7 6 5 4 3 2 1 0
Name
IGNITION
_ISO
-
GPS
_FLASH
GPS_
PWR_EN
USR_LED
[6]
USR_LED
[5]
USR_LED
[4]
USR_LED
[3]
Access
R W W W W W W
Reset
- 1 1 1 1 1 1 1
Bit Field Description
7 IGNITION_ISO Read-back the ignition status

0: Ignition signal inactive

1: Ignition signal active
5 GPS_FLASH GPS module firmware flash mode

0: Firmware flash mode

1: GPS module operation mode
4 GPS_PWR_EN GPS module power supply

0: Power supply off

1: Power supply on
3:0 USR_LED[6:3] Enable user LED

0: LED on (enabled)

1: LED off (disabled)