Avago Technologies LSI53C1010 - Manual (Page 161)

General Purpose Registers 6-11
6.9 General Purpose Registers
Table 6.8 describes SCRIPTS processor general purpose registers.
6.10 Register Initialization
The startup register values are determined by a “C” program, written by
the software developer, that can be loaded automatically by the device
driver. The appropriate startup values for the register bits depend on the
design of the individual system. Therefore, a single startup algorithm will
not support every application. The hardware default values for each bit
are provided in the appropriate chip technical manuals.
Table 6.9 and Table 6.10 list the register bits you should consider when
writing a startup program for a specific system. The startup program
does not have to initialize all bits in the chip if the default values are
acceptable. However, the bits in these lists affect features that should be
enabled or disabled and other decisions that should be made when
initializing the chip. For complete register and bit descriptions, refer to
your chip technical manual. In addition,
Chapter 2, “Programming with
Table 6.8 General Purpose Registers
Name Definition
CTEST0 Chip Test 0
DWT/SBR DMA Watchdog Timer/Scratch Byte Register
GPCNTL General Purpose Control
GPREG General Purpose
MACNTL Memory Access Control
SCRATCHA General Purpose Scratchpad A
SCRATCHB General Purpose Scratchpad B
SCRATCHC–J
1
1. LSI53C825A/875/876/885 only.
General Purpose Scratchpad C–J
SCRATCHC–R
2
2. LSI53C895/895A/896/1000/1010/1010R/1000R only.
General Purpose Scratchpad C–R