Specifications
Programmers Model
ARM DUI 0447J Copyright © 2009-2014, ARM. All rights reserved. 4-17
ID052914 Non-Confidential
Table 4-13 shows the bit assignments.
4.4.11 DMA Channel Selection Register
The SYS-DMA Peripheral Map Register characteristics are:
Purpose Permits the mapping of the two motherboard DMA channels signals to
external interfaces. The register is set to zero by a CB_nRST reset. The
DMA mapping is disabled by default. There is no DMA controller in the
motherboard. See Figure 2-9 on page 2-20.
Usage constraints There are no usage constraints.
Configurations Available in all configurations.
Attributes See Table 4-3 on page 4-8.
Table 4-13 SYS_MISC Register bit assignment
Bits Access Name Reset Description
[31:28] Write ignored,
read as zero
-
b0000
Undefined.
[27] Read-write SB_EVENTI
bX
Event input from daughterboards. See your daughterboard
documentation for more information specific to your board.
[26:25] Read-write USBnOEN[1:0]
bXX
Setting these bits LOW enables control of ISP1761
DC/HC_SUSPEND signals from USB_SUSPEND[1:0].
Setting these bit HIGH disables control of ISP1761
DC/HC_SUSPEND and the signals are pulled-high on the device.
[24:23] Read-write USB_SUSPEND[1:0]
bXX
USB_SUSPEND0 controls ISP1761 DC_SUSPEND.
USB_SUSPEND1 controls ISP1761 HC_SUSPEND.
See USB interface on page 4-39 for more information about the
ISP1761 USB controller.
[22] Read-write NOR select
b0
Only used by the MCC. Leave set to 0.
[21:20] Read-write SB1/SB2_EVENTO[1:0]
bXX
Event output to daughterboard. See your daughterboard
documentation for more information specific to your board.
[19] Read-write SWINT
b0
Direct control of the SWINT interrupt. Setting this bit sets a
SWINT interrupt. Clearing this bit clears the SWINT interrupt.
[18:15] Write ignored,
read as zero
-
b00000
Undefined.
[14] Read-only MASTERSITE
b0
Boot master select:
b0
Site 1 boot master.
b1
Site 2 boot master.
[13] Read-only nDBDET2
bX
Daughterboard detect for site 2:
b0
Board present.
b1
Board not present.
[12] Read-only nDBDET1
bX
Daughterboard detect for site 1:
b0
Board present.
b1
Board not present.
[11:0] Write ignored,
read as zero
-
0x000
Undefined.