Datasheet

14
Easy24-33 v6 Development System
MikroElektronika
page
10.0. Serial RAM Module
Owing to the built-in RAM module, the Easy24-33 v6 development system is provided with 64Kbit RAM module that can be connected
to the microcontroller via SPI interface. The function of the serial RAM module is to expand available RAM of the microcontroller. To
establish connection between the microcontroller and RAM module, it is necessary to enable SPI communication by means of the
DIP switch SW3. In the example in Figure 10-2, RAM module is connected to the RB8, RB14 and RB9 microcontroller pins. Other
microcontroller pins RB12, RB11, RB10 and RB13 may also be optionally used here. The function of the RAM-HOLD# (RB7) switch
on the DIP switch SW1 is to hold communication between the microcontroller and RAM module. The RAM-CS (RB15) switch on the
DIP switch SW1 is used to control the access to RAM.
Figure 10-2: Serial RAM module and microcontroller connection schematic
Serial RAM is connected to the microcontroller via RB15, RB7, RB8, RB14 and RB9 pins
Figure 10-1: Serial RAM module
64Kbit RAM module can be
added to the RAM module built
into the microcontroller