User`s guide

Intel
®
StrongARM
®
SA-1110 Microprocessor Development Board User’s Guide 4-11
Hardware Considerations
Note: The BCR is not reset at power up time and is maintained during sleep mode. System software must
initialize this register very early in the cold power up code.
Table 4-6. Board Control Register (Sheet 1 of 4)
0x1200,0000 Board Control Register SA-1110 Evaluation Module
Bit
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9 8 7 6 5 4 3 2 1 0
Reserved
Spk_Off Rad_On
Qmute
TV_IR_Dec_En
SMB_En
Rad_WU
COM_RTS
COM_DTR
Vib_On
D8_LED D9_LED
RS232En
LCD On
LCD12or16
Light
Audio_On
CF_Bus_On
Stereo_LB
IRDA_MD[1:0]
IRDA_FSEL
SOFT_RST
CF_RST GFX_RST
CF_PWR NEP_RST
Reset X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
Bits Name Description
0
CF_PWR
Compact Flash Power
0 – CF power off
1 – CF 3.3V power on
Must be programmed to 0 when system goes to sleep.
1
CF_RST
GFX_RST
Compact Flash Reset
See Compact Flash spec V1.3
0 – No power up reset
1 – Power up reset
Must be programmed to 1 when system goes to sleep.
Graphics Accelerator Reset
0 – Holds graphics accelerator in reset
1 – Allows graphics accelerator to run
Must be programmed to 1 when system goes to sleep
2SOFT_RST
Codec Reset
0 – Holds UCB1300, ADI7171, and UDA1341 in reset
1 – Allows UCB1300, ADI7171 and UDA1341 to run
Must be programmed to 0 when system goes to sleep.
3 IRDA_FSEL
IRDA Frequency select
0 – SIR
1 – MIR/FIR
Controls IRDA chip data rate. Refer to IRDA chip vendor spec for details
5:4
IRDA_
MD[1:0]
IRDA Mode 1:0 Range/Power select
00 – Max range and power
01 – Shutdown. Power off
10 – 2/3 range and power
11 – 1/3 range and power
Must be programmed to 01 when system goes to sleep
6 Stereo_LB
Stereo Loopback
0 – Stereo loopback off
1 – Stereo loopback on
Stereo loopback is used by the system applications to route audio signals in the SA-1110
Development Board. Loopback is also used by diagnostic software.