Analog Devices adsp-2100 Manual page 251

10 Memory Interface
Access
Internal program
memory only
Internal data
memory only
Internal program
memory, external
data memory
Internal data
memory, external
program memory
External boot
memory
Table 10.5 Pin States During Memory Accesses
Operation
Reset
Booting*
after Reset
Reboot*
BR
Asserted
during Normal
Operation, Booting*,
or Go Mode
BR
Asserted
during Reset
Table 10.6 Pin States During Reset, Booting*, and Bus Grant
* ADSP-21xx boot memory booting, not ADSP-2181 byte memory booting.
10 – 38
PMS DMS BMS
high high high
high high high
high low high
low high high
high high low
Address Data
tristated tristated
active active
active active
tristated tristated
tristated tristated
RD WR
Address
high high tristated
high high tristated
low low DM address
(for (for
read) write)
low low PM address
(for (for
read) write)
low high Boot address
(for
read)
PMS RD
DMS WR
BMS
high high
BMS RD
active active
PMS DMS WR
, high
high
BMS RD
active active
PMS DMS WR
, high
high
tristated tristated
tristated tristated
Data
tristated
tristated
DM data
PM data
Boot data,
Boot page
address
CLKOUT SPORTs
active tristated
active tristated
active active
active active
active tristated
BG
high
high
high
low
low