EMS6500 EM Microelectronic, EMS6500 Datasheet - Page 107

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

10. EM6540
Copyright  2003 EM Microelectronic-Marin SA
10.1. Port A
The peripheral interface module for the EM6540 is shown below.
Port A is an input port with individual maskable interrupts. The state of port A
(address 054H) is indicated by the by the circular LED’s as well as the push buttons
and can have values shown in Table 11-1.
to change the state of the port click on the corresponding button.
LED state
Red
Yellow
Button
Fig. 10-1 Peripheral interface for the EM6540 microcontroller
Table 10-1 Possible input port states
H
L
State
Port high
Port low
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Peripheral Interface
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EM66xx
Binder 4.3-01/03 Rev. B/495