Dsp Bus Registers - VXI VT1433B User Manual

VT1433B User's Guide
Register Definitions

DSP Bus Registers

There are two 32-bit registers in the DSP bus address space. The VXI FPGA
does not assert TA* when these registers are accessed.
200A
16
200B
16
Note that these registers appear multiple times in the memory map, since only the
address lines A31-30, A17-13, A9-8 and A3-0 are used for decoding.
The A24 registers are defined as follows:
q
Boot Register: This read/write register is used to configure the device after a device
reset. It has the following format:
Bit 31-16
Contents Unused
Spare: This read/write bit has no pre-defined function.
ST Done: This bit should be written to a one (1) when the DSP successfully
competes its self-test, within five seconds after SYSRESET* is de-asserted. Its
initial value is zero (0).
Loaded: This bit should be written to a one (1) when (or immediately after) the
DSP loads the model code, before competing its self-test. Its initial value is zero
(0).
Ready: This bit is written to a one (1) to indicate that the device is ready for
normal operation. Its initial value is zero (0).
Model Code: As soon as possible and within 25 ms after coming out of reset,
when the DSP has valid code loaded, it should write the VXI model code to
these bits. Their initial value is 0x0200.
A-14
DSP Command Register
Boot Register
15 14
Spare ST Done
13 12
Loaded Ready
11-0
Model
Code