Overview
2.5
）
/2.5=30%).
2.1.2.5Internal memory
Two pieces of AM29LV641DH90REI are used as FLASH, with space of 8M WORDS and
16-bit port.
HY57V641620HG-T-H is used as SDRAM, and its structure is 4 banks * 1M * 16 bits.
Two pieces of HY57V641620HG-T-H are used to compose the SDRAM memory space of
4M LONG WORDS and 32-bit port. The MCF5307 serves as SDRAM controller, and can
be connected with HY57V641620HG-T-H.
2.1.2.6Ethernet
AX88796L made by AXIS is used as Ethernet interface, and it features as follows:
3. 10M/100M adaptive and physical layer interface;
4. NE2000 register-grade compatible;
5. internal 8K*16 BITS SRAM;
6. LOCAL BUS interface, seamlessly connecting with MCS51, ISA and 68K;
7. MII interface, connecting to other physical layers;
To connect AX88796L with RJ45UTP ETHERNET CABLE, it only needs to connect the
network transformer, and FM81-2319 is used as the network transformer.
2.1.2.7USB interface
ISP1161A1 made by PHILIPS is used as USB interface, and SN75240PW is used to
provide the transient interference suppression for the USB two-channel descending port.
2.1.2.8CPLD
CPLD is mainly used for the following functions:
8. control logic of data buffer;
9. write protection logic for EEPROM and FLASH;
10. system reset logic;
3-14 DP-3300/DP-3200 Service Manual（V1.1）
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