 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
DP83936AVF Datasheet(PDF) 51 Page - National Semiconductor (TI) |
|
|
|
|||||||||||||||||||||||||||||
DP83936AVF Datasheet(HTML) 51 Page - National Semiconductor (TI) |
|
|
51 / 104 page  60 SONIC-T Registers (Continued) 647 Data Configuration Register 2 (RAk50l e 3Fh) This register (Figure 6-10) is for enabling the extended bus interface options A hardware reset will set all bits in this register to ‘‘0’’ except for the Extended Programmable Outputs which are unknown until written to A software reset will not affect any bits in this register This register should only be written to when the SONIC-T is in software reset (the RST bit in the Command Register is set) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 EXPO3 EXPO2 EXPO1 EXPO0 HD 0 JD AUTO 0 XWRAP FD PH 0 PCM PCNM RJCM rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw FIGURE 6-10 Data Configuration Register 2 Field Meaning EXPO3 – 0 EXTENDED PROGRAMMABLE OUTPUTS HD HEART BEAT DISABLE JD TPI JABBER TIMER DISABLE AUTO AUITPI AUTO SELECTION XWRAP TPI TRANSCEIVER LOOPBACK FD FULL DUPLEX PH PROGRAM HOLD PCM PACKET COMPRESS WHEN MATCHED PCNM PACKET COMPRESS WHEN NOT MATCHED RJCM REJECT ON CAM MATCH Bit Description 15–12 EXPOk30l EXTENDED PROGRAMMABLE OUTPUTS These bits program the level of the Extended User outputs (EXUSRk30l) when the SONIC-T is a bus master Writing a ‘‘1’’ to any of these bits programs a high level to the corresponding output Writing a ‘‘0’’ to any of these bits programs a low level to the corresponding output EXUSRk30l are similiar to USRk10l except that EXUSRk30l are only available when the Extended Bus mode is selected (bit 15 in the DCR is set to ‘‘1’’ see Section 642) 11 HD HEART BEAT DISABLE This bit allows the SONIC-T to ignore the heart beat signal 0 Enable heart beat 1 Disable heart beat 9 JD TPI JABBER TIMER DISABLE This bit allows the user to turn onoff the jabber timer 0 Enable the jabber timer 1 Disable the jabber timer 8 AUTO AUITPI AUTO SELECTION This bit allows the SONIC-T to check for a good link on the TPI and AUI SONIC-T will first look for a good link on the TPI If there is no good link on the TPI SONIC-T will automatically select the AUI If this bit is enable the AUITPI pin will be ignored 0 Disable AUITPI auto selection 1 Enable AUITPI auto selection 7 Must be zero 6 XWRAP TPI TRANSCEIVER LOOPBACK This bit controls the loopback operation for the TPI transceiver For proper operation the CAM Address Registers and Receiver Control Register must be initialized to accept the destination address of the loopback packet (refer to loopback procedure) Also both bits 9 and 10 of the RCR must be set to 1 0 Disable TPI transceiver loopback 1 Enable TPI transceiver loopback http www nationalcom 51 |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
