ADSP-21MOD980N-000 데이터 시트보기 (PDF) - Analog Devices
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ADSP-21MOD980N-000 Datasheet PDF : 42 Pages
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PRELIMINARY TECHNICAL DATA
ADSP-21mod980N For current information contact Analog Devices at (800) ANALOGD
DESIGNING AN EZ-ICE-COMPATIBLE SYSTEM
The ADSP-21mod980N has on-chip emulation support
and an ICE-Port, a special set of pins that interface to the
EZ-ICE. These features allow in-circuit emulation without
replacing the target system processor by using only a 14-pin
connection from the target system to the EZ-ICE. Target
systems must have a 14-pin connector to accept the
EZ-ICE’s in-circuit probe, a 14-pin plug.
The EZ-ICE can emulate only one modem processor at a
time. You must include hardware to select which processor
in the ADSP-21mod980N you want to emulate. Figure on
page 16 is a functional representation of the modem proces-
sor selection hardware. You can use one ICE-Port
connector with two ADSP-21mod980N processors without
using additional buffers.
GND
1
EBG
3
EBR
5
KEY
7
ELOUT
9
EE
11
RESET
13
BG
2
BR
4
ENT
6
ELIN
8
ECLK
10
EMS
12
ERESET
14
ADSP-21M OD980N
ELOUT
EBR
EBG
EINT
ELIN
ECLK
EMS
ERESET
BG0
BR 0
RESET0
EE0
BG1
BR 1
RESET1
EE1
BG2
BR2
RESET2
EE2
BG3
BR 3
RESET3
EE3
BG4
BR 4
RESET4
EE4
BG5
BR5
RESET5
EE5
BG6
BR6
RESET6
EE6
BG7
BR 7
RESET7
EE7
Figure 11. Selecting a Modem Processor in the ADSP-21mod980N
Issuing the “chip reset” command during emulation causes
the modem processor to perform a full chip reset, including
a reset of its memory mode. Therefore, it is vital that the
mode pins are set correctly PRIOR to issuing a chip reset
command from the emulator user interface. As the mode
pins share functionality with PF[2:0] on the
16
6/2001 REV. PrB
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