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Bits
Field
5-4
FLASH_SIZE
3-0
SYS_RAM_SIZE
* Indicates bit only reset to default value on power-up, and is not affected by a hard reset event.
Control Register
The Control Register provides control for various board functions such as resets and flash
write-protection settings.
Address offset:
0x10
Access:
Read/write
Bits
Field
15
OVR_TEMP_RST_EN
14
YELLOW_LED_EN
13
COM1_TYPE
12
COM2_TYPE
11 - 8
BRD_RST
(write-only)
7
COM3_TYPE
6
COM4_TYPE
5-9
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Access
Default
R
-
Flash Memory Size—indicates the system memory
density.
0b000 = 64MB (16M x 32b, 128Mb parts)
0b001 = 128MB (32M x 32b, 256Mb parts)
0b010 = 256MB(64M x 32b, 512Mb parts)
0b101 = 512MB (32M x 32b, 1024Mb parts)
R
-
System RAM Size (only valid values shown) —indicates the
system RAM size. Upper bit indicates bank count, lower bits
indicate RAM density
0b0010 = 256MB (1 x 32M x 72b, 256Mb parts)
0b0011 = 512MB (1 x 64M x 72b, 512Mb parts)
0b0100 = 1024MB (1 x 128M x 72b, 1024Mb parts)
0b1011 = 1024MB (2 x 64M x 72b, 512Mb parts)
0b1100 = 2048MB (2 x 128M x 72b, 102 MB parts)
Default
0*
Over-Temperature Reset Enable—enables a board reset by the
Temperature Sensor over-temperature reset output.
0 = reset disabled
1 = reset enabled
NOTE:
The OVERT_RST_ENBL bit is only reset by a power-up
sequence, not by other resets.
0
Yellow LED Enable—controls yellow front-panel LED.
0 = LED off
1 = LED on
1
COM1 Interface Select—selects the COM1 interface type.
0 = RS-422
1 = RS-232
1
COM2 Interface Select—selects the COM2 interface type.
0 = RS-422
1 = RS-232
0b0000
Board Reset—initiates a board reset cycle. These bits will clear
after reset.
0x5 = initiates board reset cycle
1
COM3 Interface Select—selects the COM3 interface type.
0 = RS-422
1 = RS-232
1
COM4 Interface Select—selects the COM4 interface type.
0 = RS-232
1 = RS-422
Description
Description
C2K User's Guide
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