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TNETX15AE 数据表(PDF) 14 Page - Texas Instruments |
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TNETX15AE 数据表(HTML) 14 Page - Texas Instruments |
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14 / 78 page  TNETX15AE ADDRESS-LOOKUP DEVICE SPWS041A – AUGUST 1997 – REVISED OCTOBER 1997 14 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 default register values at reset The reset values for the default registers are shown in Table 3. Table 3. Default Registers Reset Values BYTE 3 BYTE 2 BYTE 1 BYTE 0 DIO ADDRESS 0x0000 0x80 0x10 0x00 0x7FFF 0x7FFF 0x04 0x00 MDIO*(0x10) + EDIO*(0x01) 0x0000 0x08 0x00 0x00 0x00 0x00 0x0C 0x0000 0x00 0x00 0x10 0x0000 0x0000 0x14 0x0000 0x0000 0x18 0x0000 0x0000 0x1C 0x00 0x000000 0x20 0x0000 SRAM data at address 0 0x24 0x0000 0x0000 0x28 0x0000 0x00 0x00 0x2C 0x00 0x00 0x00 0x00 0x30 0x0000 0x00 0x00 0x34 0x00 0x00 0x00 0x00 0x38 0x0000 0x00 0x00 0x3C 0x00 0x00 0x00 0x00 0x40 0x00 0x00 0x00 0x00 0x44 0x00 0x00 0x00 0x00 0x48 0x00 0x00 0x00 0x00 0x4C 0x7FFD 0x7FFE 0x50 0x7FF7 0x7FFB 0x54 0x7FDF 0x7FEF 0x58 0x7F7F 0x7FBF 0x5C 0x7DFF 0x7EFF 0x60 0x77FF 0x7BFF 0x64 0x5FFF 0x6FFF 0x68 0x00 0x00 0x3FFF 0x6C EEPROM auto-configuration from an external x24C02 EEPROM The flash EEPROM interface is provided so the system-level manufacturers can provide an optional preconfigured system to their customers. Customers can change or reconfigure their system and retain their preferences between system power downs. The flash EEPROM contains configuration and initialization information, which is accessed infrequently (typically at power up and reset). The TNETX15AE uses the 24C02 serial EEPROM device (2048 bits organized as 256 × 8). This device uses a two-wire serial interface for communications. EEPROM programming can be done while in the system through the TNETX15AE EDIO port using suitable driver software. |
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