Status Indicator Register - SMART Embedded Computing MVME4100 Programmer's Reference Manual

Register Descriptions
EEPROM_WP
BRD_RST
RSVD
3.1.3

Status Indicator Register

The MVME4100 provides a Status Indicator Register that may be read by the system
software to determine the state of the on-board status indicator LEDs or written to by
system software to illuminate the corresponding on-board LEDs.
Table 3-4
REG
BIT
Field
OPER
RESET
USR1R
USR1Y
USR2_LED User LED 2. This bit is used to control the planar USR2 LED. A set condition
USR3_LED User LED 3. This bit is used to control the planar USR3 LED. A set condition
RSVD
28
EEPROM Write Protect. This bit is to provide protection against inadvertent
writes to the on-board EEPROM devices. Clearing this bit will enable writes
to the EEPROM devices. Setting this bit write protects the devices. The
devices are write protected following a reset.
Board Reset. These bits are used to force a hard reset of the board. If a
pattern is written in bits 5-7 where bit 7 is set, bit 6 is cleared, and bit 5 is
set (101), a hard reset is generated. Any other pattern written in bits 5-7,
does not generate a hard reset. These bits are cleared automatically when
the board reset has been completed. These bits are always cleared during
a read.
Reserved for future implementation.
Status Indicator Register
Status Indicator Register - 0xF200 0002
7 6 5
RSVD RSVD RSVD
R R R
0 0 0
User LED 1 RED. This bit is used to control the USR1 bi-color LED located on the
front panel. A set condition illuminates the red segment of the front panel LED and a
cleared condition extinguishes the red segment of the front panel LED.
User LED 1 Yellow. This bit is used to control the USR1 bi-color LED located on the
front panel. A set condition illuminates the yellow segment of the front panel LED and
a cleared condition extinguishes the yellow segment of the front panel LED.
illuminates the LED and a cleared condition extinguishes the LED.
illuminates the LED and a cleared condition extinguishes the LED.
Reserved for future implementation
MVME4100 Single Board Computer Programmer's Reference (6806800H19D)
4 3 2
RSVD USR3 USR2
R R/W R/W
0 0 0
Register Descriptions
1 0
USR1 USR1
Y R
R/W R/W
0 1