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DM9008AEP データシート(PDF) 9 Page - Davicom Semiconductor, Inc. |
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DM9008AEP データシート(HTML) 9 Page - Davicom Semiconductor, Inc. |
9 / 50 page DM9008AEP Ethernet Controller with General Processor Interface Preliminary 9 Version: DM9008AEP-DS-P03 Dec. 14, 2006 5. Pin Description I = Input O = Output I/O = Input/Output O/D = Open Drain P = Power # = asserted low PD = internal pull-low about 60K 5.1 Processor Interface Pin No. Pin Name Type Description 35 IOR# I,PD Processor Read Command This pin is low active at default, its polarity can be modified by EEPROM setting. See the EEPROM content description for detail 36 IOW# I,PD Processor Write Command This pin is low active at default, its polarity can be modified by EEPROM setting. See the EEPROM content description for detail 37 CS# I,PD Chip Select A default low active signal used to select the DM9008A. Its polarity can be modified by EEPROM setting. See the EEPROM content description for detail. 32 CMD I,PD Command Type When high, the access of this command cycle is DATA port When low, the access of this command cycle is INDEX port 34 INT O,PD Interrupt Request This pin is high active at default, its polarity can be modified by EEPROM setting or by strap pin EECK. See the EEPROM content description for detail 18,17,16,1 4,13,12,11 ,10 SD0~7 I/O,PD Processor Data Bus bit 0~7 31, 29, 28, 27, 26, 25, 24, 22 SD8_GP1, SD9_GP2, SD10_GP3, SD11_GP4, SD12_GP5, SD13_GP6, SD14_LED3, SD15_WAKE I/O,PD Processor Data Bus bit 8~15 In 16-bit mode (see EECS pin description), these pins act as the processor data bus bit 8~15; In 8-bit mode, these pins have other definitions in the followings: Pin 31,29,28,27,26,25 act as the general purpose pins that defined in REG.1Eh and 1Fh. The SD13_ GP6 pin also act as trap pin for the INT output type. When SD13_GP6 is pulled high, the INT is Open-Drain output type; Otherwise it is force output type. Pin 24 is act as full-duplex LED in LED mode 1; otherwise it act as 10Base-T link LED in LED mode 0. (Note: LED mode is defined in EEPROM setting.) Pin 22 is act as a wake up signal. 5.2 EEPROM Interface Pin No. Pin Name Type Description 19 EEDIO I/O,PD IO Data to EEPROM 20 EECK O,PD Clock to EEPROM This pin is also used as the strap pin of the polarity of the INT pin When this pin is pulled high, the INT pin is low active; otherwise the INT pin is high active 21 EECS O,PD Chip Select to EEPROM This pin is also used as a strap pin to define the internal memory data bus width. When it is pulled high, the memory access bus is 8-bit; Otherwise it is 16-bit. |
同様の部品番号 - DM9008AEP |
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同様の説明 - DM9008AEP |
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