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UM024502-1012 Memory
ZGATE Embedded Security Development Kit
User Manual
107
Memory
On the ZGATE Embedded Security Development Board, the eZ80F91 MCU features the
following memory configurations:
8 KB on-chip SRAM
256 KB on-chip Flash
1 MB off-chip SRAM; U2 and U3 are accessible by chip selects CS1 and CS2
8 MB off-chip Flash: U11 is accessible by chip select CS0
To learn more about the operation of the eZ80F91 MCU’s internal memory, refer to the
eZ80F91 ASSP Product Specification (PS0270)
.
Power Sources
The Board features two power source options. It can be powered by connecting Port P3
(USB Mini-B) to the USB port of the development PC using the USB A to USB mini-B
cable included in the Kit. The other option is to connect a female plug to an external
5 VDC source with at least 300–400mA of current to Port P2. A drawing of an optional
external power supply plug is shown in Figure 15.
When the Board is powered via a USB connection, communication with the development
PC can be established through the FT232RL chip (U8) to provide a USB-to-serial inter-
face. The UART0 block of the eZ80F91 MCU is connected to this chip.
Legend
A = 3.5 mm
B = 1.3 mm
C = 6 mm or longer
Figure 15. Female Plug
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