August 2006
Intermediate to advanced
344 pages
9h 2m
English
Content preview from Designing SOCs with Configured Cores
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10.6. Direct Input and Output Ports
Two of the Diamond 570T CPU core’s unique features are its 32-bit direct input and output ports, which are the same I/O ports found on the Diamond 108Mini processor core. The input and output wires on these ports connect directly to special software-visible registers in the processor core and can be used for general-purpose signaling, interrupt generation, serial communications, pulse-width modulation, and other sorts of status and control functions on the SOC. Special instructions read and manipulate the contents of these port registers. Table 10.6 lists these port instructions.
| Instruction | Definition |
|---|---|
| CLRB_EXPSTATE | Clear any bit in the output-port register. ... |
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