Monaco Technical Reference Spectrum Signal Processing
DSP~LINK3 Interface
30 Part Number 500-00191
Revision 2.00
Table 10 DSP~LINK3 Data Transfer Operating Modes
Mode Base
Address ASTRB_EN
Bit Description
Standard
Access
0160 0000h
x
For slave boards that are similar to DSP~LINK1
slave boards and operate with a fixed access
time.
Standard
Fast
Access
0164 0000h 0 For DSP~LINK3 slave boards that have fast,
fixed access time. This memory space is
shared with the Address Strobe Control
operating mode.
Address
Strobe
Control
0164 0000h 1 For slave boards that require more than the
16 KWords of addressing provided by the
standard DSP~LINK3 address lines. The bus
master uses the /ASTRB cycle to place the
page address onto the DSP~LINK3 data lines.
It determines which address page is accessed
on the slave board. This allows access to up to
214 address pages with each address page
having an address depth of 214. The /ASTRB
Cycle has the same timing as the Standard
Fast transfer cycle.
Ready
Control
Access
0168 0000h
x
For DSP~LINK3 slave boards that require
variable length access times. /DSTRB is active
until the slave asserts the DSP~LINK3 ready
signal (/RDY) to end the cycle.
5.2. Address Strobe Control Mode
The Address Strobe Control mode uses the same node A 64K address space as the
Standard Fast Access mode. The Address Strobe Control mode is enabled for this space
by setting bit D1, the ASTRB_EN bit, of the DSP~LINK3 register to “1”. This register is
located at address 016D 8018h of node A. Standard Fast Access mode writes will now
generate /ASTRB cycles. The DSP~LINK3 slave attached to the Monaco board should
then latch the lower addresses.