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SYSTEM CONTROL MODULE
Miscellaneous System Configuration and Status register
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Register bit
assignment
Bits Access Mnemonic Reset Description
D31:24 R REV 0x0 Revision
Indicates the hardware identification and revision of
the processor chip.
D23:16 R ID 0x3 Identification
Identifies the chip as:
0 NS9750B-A1
1 NS9360
2 NS9210
3 NS9215
D15:07 N/A Reserved N/A N/A
D06 R AUX/COMP N/A Auxiliary analog comparator status
0 Level is below 2.4V
1 Level is above 2.4V
D05 R Boot mode HW strap
gpio_a[2]
Boot mode
0 Boot from SPI
1 Boot from flash
D04:03 R Boot width HW strap
gpio_a[0]
addr[23]
If boot mode is set to boot from flash:
00 8-bit
01 32-bit
10 32-bit
11 16-bit
If boot mode is set to boot from SPI:
00 Reserved
01 Boot using 8-bit address SPI device
10 Boot using 24-bit address SPI device
11 Boot using 16-bit address SPI device
D02 R/W End mode HW strap
gpio_a[3]
Endian mode
0 Little endian mode
1 Big endian mode
D01 R/W Mis bus resp 0x0 Misaligned bus address response mode
0 Allow misaligned bus addresses
1 Generate an error response when a misaligned
bus address is found; that is, when
haddr bits 1 or
0 are not level 0.
D00 R/W Int reg acc 0x1 Internal register access mode bit 0
0 Allow access to internal registers using
PRIVILEGED mode only
1 Allow access to internal registers using
PRIVILEGED or USER mode