參數(shù)資料
型號: AM79C930VCW
廠商: ADVANCED MICRO DEVICES INC
元件分類: 微控制器/微處理器
英文描述: PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
中文描述: 2 CHANNEL(S), LOCAL AREA NETWORK CONTROLLER, PQFP144
封裝: TQFP-144
文件頁數(shù): 49/161頁
文件大?。?/td> 691K
代理商: AM79C930VCW
P R E L I M I N A R Y
AMD
49
Am79C930
T1
TXDATA
T2
T3
2 X TSCLK
TGAP2 X TBCLK
+ 2 X TSCLK
TGAP1 X TBCLK
+ 2 X TSCLK
1st
Data Bit
Last
Data Bit
2 X TSCLK
TXS
4 X TSCLK
TSCLK = TCLKIN when
CLKGT20 = 0
TBCLK = TSCLK X 20
TGAP3 X TBCLK
+ 2 X TSCLK
O_TX
TXP_ON
3 X TSCLK
HDB X TBCLK
TX default bit
DRB X TBCLK
TGAP4 X TBCLK
+ 2 X TSCLK
TX default bit
7 X TSCLK
20183B-7
Figure 1. Transmitter Power Ramp Control
The values HDR, DRB, TGAP1, TGAP2, TGAP3, and
TGAP4 are programmable values that are stored in
TCR register locations TCR0, TCR5, and TCR6. All
other timings in the diagram are fixed with the values in-
dicated. The CLKGT20 control bit is located in MIR9[7].
The timing of the five internal signals can be applied to
the external pins
TXCMD
,
TXPE
, and
TXMOD
in
either of two ways, depending upon the value pro-
grammed into the RCEN bit of TIR11 as shown in the
following table:
Pin
Name
Timing Reference
When RCEN=0
Timing Reference
When RCEN=1
TXCMD
O_TX
T1
TXPE
TXP_ON
T2
TXMOD
T3
T3
Note that the TXCMD, TXPE, and TXMOD bits of TIR11
may also affect the values of the
TXCMD
,
TXPE
, and
TXMOD
pins. See the individual descriptions of these
pins in the Multi-Function Pinsection of this document
for more detail.
The polarity of
TXMOD
and
TXPE
are programmable. A
separate TXCMD signal (inverse polarity to
TXCMD
)
is available.
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