EMS6500 EM Microelectronic, EMS6500 Datasheet - Page 81

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

Copyright  2003 EM Microelectronic-Marin SA
5.2.
5.3.
5.4.
5.5.
5.6.
Port B is a bitwise select input output port. The state of port B (address 052H) is
shown by the LED and buttons. When the port is input the state can be changed
using the corresponding push buttons. When the port is set to output (address
051H) the button is set to NC (not connected) and the LED indicates the state of the
output port. Consequently the possible combinations for the LED and button states
are shown in Table 5-3.
Port C can be configured as either a 4 bit input port or a 4 bit output port (bit 1
address 053H). The possible combinations for the LED and button states are the
same as for port B and are shown in Table 5-3.
The EM6517 has two 8bit ADC channels. Using the scroll bars can modify the value
of each channel. The actual value of each channel is shown.
The state of the 1Hz and 32Hz interrupt masks are shown. The symbol
that the interrupt mask is active and the symbol
inactive
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 would not stop the software simulation of the
microcontroller.
LED state
Port B
Port C
ADC
Prescaler
Supply level detection
Red
Yellow
Red
Yellow
Table 5-3 Possible states for input output port B.
Button
NC
NC
H
L
State
Port input and high
Port input and low
Port output and high
Port output and low
17
indicates that the interrupt mask is
Peripheral Interface
www.emmicroelectronic.com
EM66xx
Binder 4.3-01/03 Rev. B/495
indicates