Kontron AM4011, Руководство пользователя

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Configuration AM4011
Page 4 - 14 ID 1022-1626, Rev. 1.0
P R E L I M I N A R Y
4.4.12 User-Specific LED Configuration Register
The User-Specific LED Configuration Register holds a series of bits defining the onboard
configuration for the front panel User-Specific LEDs.
Regardless of the selected configuration, the User-Specific LEDs are used to signal a number
of fatal onboard hardware errors, such as:
ULED0: BIOS boot fail (red)
ULED1: Hardware reset (red)
ULED2: Clock fail (red)
ULED3: Power fail (red)
1)
In BIOS POST mode (default), the User-Specific LEDs build a binary vector to display BIOS
POST code during the pre-boot phase. In doing so, the higher 4-bit nibble of the 8-bit BIOS
POST code is displayed followed by the lower nibble followed by a pause. BIOS POST code is
displayed in general in green color.
ULED0: POST bit 0 and bit 4 (green)
ULED1: POST bit 1 and bit 5 (green)
ULED2: POST bit 2 and bit 6 (green)
ULED3: POST bit 3 and bit 7 (green)
For further information on reading the 8-Bit BIOS POST Code, refer to section 2.3.1, “Front
Panel LEDs”.
2)
Configured for DIAG, the User-Specific LEDs are dedicated to functions as follows:
ULED0: Ethernet Link Status of AMC channel B (green)
ULED1: Ethernet Link Status of front channel D (green)
ULED2: Ethernet Link Status of front channel C (green)
ULED3: Ethernet Link Status of AMC channel A (green)
3)
Configured for TEST, the User-Specific LEDs are dedicated to functions as follows:
ULED0: User-Specific LED 0 (red/green)
ULED1: User-Specific LED 0 (red/green)
ULED2: User-Specific LED 0 (red/green)
ULED3: User-Specific LED 0 (red/green)
Table 4-19: User-Specific LED Configuration Register
REGISTER NAME USER-SPECIFIC LED CONFIGURATION REGISTER
ADDRESS 0x28B
BIT NAME DESCRIPTION
RESET
VALUE
ACCESS
7-4 Res. Reserved 0000 R
3-0 ULCON User-Specific LED Configuration
0000 = POST
1)
0001 - 1101 = Reserved
1110 = DIAG
2)
This is the default mode after POST.
1111 = TEST
3)
0000 R/W