EMS6500 EM Microelectronic, EMS6500 Datasheet - Page 98

• Manufacturer Part Number: EMS6500
• Description: Microcontroller Development System 4-bit (Emmon), Simulators 4-bit
• Manufacturer: EM Microelectronic

Copyright  2003 EM Microelectronic-Marin SA
8.7.
8.8.
8.9.
The parameters for the 7-tone melody generator and there possible values are the
following:
It is possible to simulate changes in the supply level from 0V to 5V with the use of
the scroll bar. The minimum precision is 0.01V, although steps of 0.1V can be
obtained using the page-up and page down function keys. It should be noted that
reducing the supply voltage to 0V will not stop the software simulation of the
microcontroller.
The equivalent ROM version allows the user to select by metal option 3 different
system operating clock for the CPU 32kHz, 64kHz or 128kHz.
The clock for the peripherals is always 32 kHz.
Pressing the appropriate button on the simulator can simulate these frequencies.
Parameter
Buzzer Out
IRQ Enabled
XX Hz Output
Timer frequency
and counter
Autoreload
Continuous
Melody Generator
Supply level detection
CPU Frequency level
Table 8-7 Melody generator parameters and possible states
Signification
Buzzer output activate
IRQ mask active count down
event
Output frequency
Base frequency for the timer and
the number of events before an
IRQ
The state of the autoreload
function
Frequency is continuously output
and is independent of the timer
34
Peripheral Interface
Possible values
0 Hz
1365 Hz
1638 Hz
2048 Hz
2340 Hz
2730 Hz
3276 Hz
4096 Hz
1, 4,16, 64 Hz Clk
events 0-0FH
Disabled
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
Enabled
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