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ARM DUI 0125A
© Copyright ARM Limited 1999. All rights reserved.
4-11
4.3.4 CM_CTRL (0x1000000C)
The core module control register (CM_CTRL) is a read/write register that provides
control of a number of user-configurable features of the core module.
Table 4-5 describes the core module control register bits.
Table 4-5 CM_CTL register
Bits Name Access Function
31:8 Reserved Use read-modify-write to preserve value.
7:4 Reserved Use read-modify-write to preserve value.
3
RESET
Write This is used to reset the core module, the
motherboard on which it is mounted, and any core
modules in a stack. A reset is triggered by writing
a 1. Reading this bit always returns a 0 allowing
you to use read-modify-write operations without
masking the RESET bit.
2
REMAP
Read/write This only has affect when the core module is
mounted onto a motherboard. When this is the
case, and this bit is a 0, accesses to the first
256KB (0x00000000 to 0x0003FFFF) of memory
are redirected into the motherboard.
1
nMBDET
Read This bit indicates whether or not the core module
is mounted on a motherboard:
0 = mounted on motherboard
1 = standalone.
0 LED Read/write This bit controls the green MISC LED on the core
module:
0 = LED OFF
1 = LED ON.
31 01234
Reserved
LEDnMBDETREMAPRESET