Table of Contents
Advertisement
System Status Register 1
The MVME5500 board system status register 1 is used to provide board
status information and software control of Abort.
REG
BIT
FIELD
OPER
RESET
REF_CLK
Reference clock. This bit reflects the current state of the 28.8 KHz
reference clock derived from the 1.8432 MHz UART oscillator
divided by 64. This clock may be used as a fixed timing reference.
BANK_SEL
Boot Flash bank select. This bit reflects the current state of the boot
Flash bank select jumper. A cleared condition indicates that Flash 0 is
the boot bank. A set condition indicates that Flash 1 is the boot bank.
SAFE_START
ENV safe start. This bit reflects the current state of the ENV safe start
select jumper. A cleared condition indicates that the ENV settings
programmed in NVRAM, VPD, and SPD should be used by the
firmware. A set condition indicates that firmware should use the safe
ENV settings.
http://www.motorola.com/computer/literature
Table 1-10. System Status Register 1
System Status Register 1 - Offset 0x0 0000
7
6
5
R
R
R
X
X
X
System Status Register 1
4
3
2
R/W
R
R
1
X
X
1
1
0
R
R
0
0
1-11
Advertisement
Table of Contents
