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Hardware Description
3-14
Copyright © ARM Limited 2000. All rights reserved.
3.4.3
Boot and mode control
Two switches housed within the 5-element DIL switch pack are connected to the system
controller PLD (see Software readable switches on page 3-21). The system controller
PLD senses S4 and S5 to support the following functions:
SW5
is the BOOTSEL switch. It is used by the boot monitor component of the
ARM Firmware Suite (AFS) to select between the default or alternative
boot image. If you are not using AFS, this switch can be assigned another
meaning.
SW4
is the DEVMODE switch. It is used to select development mode.
Development mode allows the system to be reset while the SA-1100 is in
sleep mode. Development mode should only be used when DRAM
contents can be considered as undefined when returning from sleep
mode.
3.4.4
LCD power control and battery sensing
This function of the system controller provides:
•
power supply mode control
•
LCD power and bias control
•
battery sensing.
Figure 3-6 on page 3-15 shows the architecture of the power output control function of
the PLD.
COM[2:1]_SENSE
COM[2:1] port
GPIO1
These are low priority interrupts generated when a
change of state is detected on the COM ports, either
when a cable is plugged in or unplugged.
UCB_IRQ
UCB1200 codec
GPIO1
The interrupt generated by a data transfer request, a
touch screen event or an event on the GPIO pins.
Each of these sources is programmable in the
UCB1200.
KEY_nATTN
Keyboard controller
GPIO0
This interrupt generated by a keyboard event, a
switch event, or as a handshake signal for the
keyboard protocol.
Table 3-3 Interrupt summary (continued)
Interrupt signal
Source
SA-1100 pin
Function
Summary of Contents for Prospector P1100
Page 1: ...ARM DUI 0122A Prospector P1100 User Guide ...
Page 4: ...iv Copyright ARM Limited 2000 All rights reserved ARM DUI 0122A ...
Page 86: ...Hardware Description 3 54 Copyright ARM Limited 2000 All rights reserved ARM DUI 0122A ...
Page 140: ...Connector reference A 18 Copyright ARM Limited 2000 All rights reserved ARM DUI 0122A ...