參數(shù)資料
型號(hào)： AX88140AQ
廠商： Electronic Theatre Controls, Inc.
英文描述： Fast Ethernet MAC Controller
中文描述： 快速以太網(wǎng)MAC控制器
文件頁(yè)數(shù)： 27/46頁(yè)
文件大小： 467K
代理商： AX88140AQ
AX88140A
PRELIMINARY
ASIX ELECTRONICS CORPORATION
27
4.2.10 Serial ROM and MII Management Register (REG9)
1.
The register provides an interface to the Microwire serial ROM and to the physical layer
protocol (PHY). It selects the device and contains both the commands and data to be read from
and stored in the serial ROM.
The MII management selects and operation mode for reading and writing the MII.
2.
FIELD
31:20
19
R/W/C
-
R
DESCRIPTION
Reserved.--Written as “0” for future compatibility concern.
MDI - MII management data_in
Used by the AX88140A to read data from the PHY
MII - MII management operation mode
Defines the operation mode (read or write) of the PHY.
MDO - MII Management write data
Specifies the value of the data that AX88140A writes to the PHY
MDC - MII Management clock
MII management data clock (MII_MDC) is an output signal to the PHY. it is used as a timing
reference.
RD - Read operation
Read control bit. When set together with REG9<12>, The AX88140A performs read cycles from the
BOOT ROM, and the serial ROM.
Reserved.--Written as “0” for future compatibility concern.
SR - SERIAL ROM select
When set together with either SERIAL ROM read operation (REG9<14>) or SERIAL ROM Write
operation (REG9<13>), The AX88140A selects the SERIAL ROM.
Reserved.--Written as “0” for future compatibility concern.
SDO - SERIAL ROM data_out
SERIAL ROM data output(SR_DO) From the SERIAL ROM device to the AX88140A.
SDI - SERIAL ROM data_in
SERIAL ROM Data input(SR_DI) To the SERIAL ROM device from the AX88140A.
18
R/W
17
R/W
16
R/W
14
R/W
13:12
11
-
R/W
10:4
3
-
R/W
2
R
1
R/W
SCLK - SERIAL ROM serial clock
Serial clock (SR_CK) Output to the SERIAL ROM.
0
R/W
SCS - Serial ROM Chip Select
Chip select (sr_cs) output to the serial ROM.
Tab - 25 REG9 Serial ROM, and MII Management Register Description
4.2.11 General -Purpose Timer (REG11)
1.
This register contains a 16 bit general-purpose timer. It is used mainly by the software driver
for timing functions not supplied by the operating system. After the timer is loaded, it starts
counting down . The expiration of the timer causes an interrupt in REG5<11>.
If the timer expires with the CON bit on, the counter will load itself automatically with the last
value. The timer is not active in snooze mode.
2.
Field
R/W/C
Description
Reserved.--Written as “0” for future compatibility concern.
CON - Continuous Mode
31:17
16
-
1
Continuous operating mode.
R/W
0
One-shot operating mode.
15:0
R/W
Timer value
Contains the general-purpose timer value within a N microsecond cycle.
SRL_10M
: 204.8us
MII_10M
: 819.2us
MII_100M : 81.92us
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