adsp-2188m Analog Devices, Inc., adsp-2188m Datasheet - Page 17

• Manufacturer Part Number: adsp-2188m
• Description: Dsp Microcomputer
• Manufacturer: Analog Devices, Inc.

In addition to the programmable flags, the ADSP-2188M has five
fixed-mode flags, FI, FO, FL0, FL1, and FL2. FL0–FL2 are
dedicated output flags. FI and FO are available as an alternate
configuration of SPORT1.
Note: Pins PF0, PF1, PF2, and PF3 are also used for device
configuration during reset.
Instruction Set Description
The ADSP-2188M assembly language instruction set has an
algebraic syntax that was designed for ease of coding and read-
ability. The assembly language, which takes full advantage of the
processor’s unique architecture, offers the following benefits:
• The algebraic syntax eliminates the need to remember cryptic
• Every instruction assembles into a single, 24-bit word that
• The syntax is a superset ADSP-2100 Family assembly lan-
• Sixteen condition codes are available. For conditional jump,
• Multifunction instructions allow parallel execution of an
DESIGNING AN EZ-ICE-COMPATIBLE SYSTEM
The ADSP-2188M 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.
Issuing the chip reset command during emulation causes the
DSP 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. If a passive method of maintaining mode information is
being used (as discussed in Setting Memory Modes), it does not
matter that the mode information is latched by an emulator
reset. However, if the RESET pin is being used as a method of
setting the value of the mode pins, the effects of an emulator
reset must be taken into consideration.
One method of ensuring that the values located on the mode
pins are those desired is to construct a circuit like the one shown
in Figure 12. This circuit forces the value located on the Mode
A pin to logic high; regardless of whether it is latched via the
RESET or ERESET pin.
assembler mnemonics. For example, a typical arithmetic add
instruction, such as AR = AX0 + AY0, resembles a simple
equation.
can execute in a single instruction cycle.
guage and is completely source and object code compatible
with other family members. Programs may need to be relocated
to utilize on-chip memory and conform to the ADSP-2188M’s
interrupt vector and reset vector map.
call, return, or arithmetic instructions, the condition can
be checked and the operation executed in the same instruc-
tion cycle.
arithmetic instruction with up to two fetches or one write to
processor memory space during a single instruction cycle.
See the ADSP-2100 Family EZ-Tools data sheet for complete
information on ICE products.
The ICE-Port interface consists of the following ADSP-2188M
pins: EBR, EINT, EE, EBG, ECLK, ERESET, ELIN, EMS,
and ELOUT
These ADSP-2188M pins must be connected only to the EZ-ICE
connector in the target system. These pins have no function except
during emulation, and do not require pull-up or pull-down
resistors. The traces for these signals between the ADSP-2188M
and the connector must be kept as short as possible, no longer
than 3 inches.
The following pins are also used by the EZ-ICE: BR, BG,
RESET, and GND.
The EZ-ICE uses the EE (emulator enable) signal to take con-
trol of the ADSP-2185M in the target system. This causes the
processor to use its ERESET, EBR, and EBG pins instead of
the RESET, BR, and BG pins. The BG output is three-stated.
These signals do not need to be jumper-isolated in your system.
The EZ-ICE connects to your target system via a ribbon cable
and a 14-pin female plug. The female plug is plugged onto the
14-pin connector (a pin strip header) on the target board.
Target Board Connector for EZ-ICE Probe
The EZ-ICE connector (a standard pin strip header) is shown in
Figure 13. You must add this connector to your target board
design if you intend to use the EZ-ICE. Be sure to allow enough
room in your system to fit the EZ-ICE probe onto the 14-pin
connector.
KEY (NO PIN)
ELOUT
RESET
EBR
GND
EBG
EE
1k
11
13
1
3
5
7
9
TOP VIEW
PROGRAMMABLE I/O
MODE A/PFO
ERESET
RESET
ADSP-2188M
10
12
14
4
6
8
2
ADSP-2188M
ERESET
BG
BR
EINT
ELIN
EMS
ECLK