Specifications

Preface
ARM DUI 0447J Copyright © 2009-2014, ARM. All rights reserved. ix
ID052914 Non-Confidential
Timing diagrams sometimes show single-bit signals as HIGH and LOW at the same time and
they look similar to the bus change shown in Key to timing diagram conventions on page viii.
If a timing diagram shows a single-bit signal in this way then its value does not affect the
accompanying description.
Signals
The signal conventions are:
Signal level The level of an asserted signal depends on whether the signal is
active-HIGH or active-LOW. Asserted means:
• HIGH for active-HIGH signals.
• LOW for active-LOW signals.
Lower-case n At the start or end of a signal name denotes an active-LOW signal.
Additional reading
This section lists publications by ARM and by third parties.
See Infocenter,
http://infocenter.arm.com , for access to ARM documentation.
See on ARM,
http://onarm.com , for embedded software development resources including the
Cortex
®
Microcontroller Software Interface Standard (CMSIS).
ARM publications
This book contains information that is specific to this product.
The following publications are open access documents that provide information about ARM
Systems IP peripherals and controllers used in the motherboard:
• ARM
®
PrimeCell PS2 Keyboard/Mouse Interface (PL050) Technical Reference Manual
(ARM DDI 0143)
• ARM
®
PrimeCell Color LCD Controller (PL111) Technical Reference Manual
(ARM DDI 0293)
• ARM
®
PrimeCell Multimedia Card Interface (PL180) Technical Reference Manual
(ARM DDI 0172)
• ARM
®
PrimeCell Advanced Audio CODEC Interface (PL041) Technical Reference
Manual
(ARM DDI 0173)
• ARM
®
PrimeCell UART (PL011) Technical Reference Manual (ARM DDI 0183)
• ARM
®
PrimeCell Real Time Clock (PL031) Technical Reference Manual
(ARM DDI 0224)
• ARM
®
PrimeCell System Controller (SP810) Technical Reference Manual
(ARM DDI 0254)
• ARM
®
Dual-Timer Module (SP804) Technical Reference Manual (ARM DDI 0271)
• ARM
®
Watchdog Module (SP805) Technical Reference Manual (ARM DDI 0270).