GA3284 Datasheet, PDF (11/15 Pages) ON Semiconductor – Pre-configured DSP System

INSPIRIA GA3284
Example:
If MS2 = OPEN and there are 4 valid memories:
ABCABCA…
If MS2 = OPEN and there are 3 valid memories: ABABA…
If MS2 = HIGH: D…
Table 3. DYNAMIC EXAMPLE WITH FOUR VALID MEMORIES (T = momentary switch is toggled; 0 = OPEN; 1 = HIGH)
MS2
0
0
0
1
1
1
0
0
0
1
0
0
0
0
0
0
MS
0
T
T
0
T
T
0
T
T
0
0
T
T
T
T
T
Memory A
B
C
D
D
D
C
A
B
D
B
C
A
B
C
A
Static Switch on MS and MS2
This mode uses two static switches to change memories.
Table 4 describes which memory is selected depending on
the state of the switches.
In this mode, it is possible to jump from any memory to
any other memory simply by changing the state of both
switches. If both switches are changed simultaneously, then
the transition is smooth. Otherwise, if one switch is changed
and then the other, the part transitions to an intermediate
memory before reaching the final memory. The part starts in
whatever memory the switches are selecting. If a memory is
invalid, the part defaults to memory A.
This mode is set by programming the ‘MSSMode’
parameter to ‘static’ and ‘Donly’ to ‘disabled’.
Table 4. MEMORY SELECTED IN STATIC SWITCH ON
MS and MS2 MODE; Internal Resistors Set to Pull Down
MS
MS2
Memory
OPEN OPEN
A
HIGH OPEN
B (if valid, otherwise A)
OPEN HIGH
C (if valid, otherwise A)
HIGH
HIGH
D (if valid, otherwise A)
Static Switch on MS, Static Switch on MS2 (Jump to
Last Memory)
This mode uses two static switches to change memories.
Unlike in the previous example, this mode will switch to the
last valid memory when the static switch on MS2 is HIGH.
This means that this mode will only use a maximum of three
memories (even if four valid memories are programmed).
Table 5 describes which memory is selected depending on
the state of the switches.
This mode is set by programming the ‘MSSMode’
parameter to ‘static’ and ‘Donly’ to ‘enabled’.
Table 5. MEMORY SELECTED IN STATIC SWITCH ON
MS, Static Switch on MS2 (Jump to Last Memory)
Mode; Internal Resistors Set to Pull Down
MS
MS2
Memory
OPEN OPEN
A
HIGH OPEN
B (if valid, otherwise A)
OPEN
HIGH
D
HIGH
HIGH
D
In this mode, it is possible to jump from any memory to
any other memory simply by changing the state of both
switches. If both switches are changed simultaneously, then
the transition is smooth. Otherwise, if one switch is changed
and then the other, the part transitions to an intermediate
memory before reaching the final memory.
When MS2 is set HIGH, the state of the switch on MS is
ignored. This prevents memory select beeps from occurring
if switching MS when MS2 is HIGH. The part starts in
whatever memory the switches are selecting. If a memory is
invalid, the part defaults to memory A.
Audible Memory Change Indicator
The Inspiria GA3284 can be programmed to produce
tones to indicate a memory change. Using the Interactive
Data Sheet, the Inspiria GA3284 can be configured to either
enable or disable the Memory Change Indicator.
When the Memory Change Indicator is enabled, there is
an option to have a single beep for each memory change or
to have multiple beeps.
The amplitude and frequency of the memory change tone
can be selected independently from the Tone Generator
settings and can be individually selected for each memory.
When the memory change multiple beep is enabled, and the
memory change tone is enabled, then during a memory
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