參數(shù)資料
型號(hào)： AM79C930
廠商： Advanced Micro Devices, Inc.
英文描述： PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
中文描述： PCnet -移動(dòng)單芯片無線局域網(wǎng)媒體接入控制器
文件頁數(shù)： 119/161頁
文件大小： 691K
代理商： AM79C930
P R E L I M I N A R Y
AMD
119
Am79C930
3–0
A2DT[3:0]
1010b
A/D sampling Time[3:0]. The value in the A2DT[3:0] field deter-
mines the duration of time required to convert the A/D input. Each
bit of resolution is equal to 4 times the CLKIN period when the
CLKGT20 bit of MIR9 is set to 0 and is equal to 8 times the CLKIN
period when the CLKGT20 bit of MIR9 is set to 1. For a 1Mbs data
rate with CLKIN = 20 MHz and CLKGT20 = 0, the resolution is 200
n. The A2DT value is used by all A/D modes, including the mode
that uses the internal A/D converter. The internal A/D converter
requires 600 nsec to convert – note that the default value of this reg-
ister is 2.0
μ
s for a CLKIN equal to 20MHz with the CLKGT20 bit set
to 0.
Note that the actual time for conversion is less than the A2DT pro-
grammed value by 1.5 CLKIN periods (with CLKGT20=0, it is 3
CLKIN periods if CLKGT20=1). This fact is important when using an
external A/D converter in the external A/D mode.
Minimum value in the A2DT[3:0] field must be 0001. A value of 0000
is not allowed.
Note: ADIN1, ADIN2, and SAR_LATCH signals are only valid as shown when ENEXT (TCR25[6]) has been set to a 1.
20138B-9
ANTSLT
tA = period of CLKIN when CLKGT20 = 0
tA = (period of CLKIN) X 2 when CLKGT20 = 1
CCA_TEST
(Internal Signal)
START_A2D
(Internal Signal)
ADT[5:0]=TCR4[5:0]
CACT=TIR27[7]
SS[5:0]=TCR24[5:0]
2 X tA
A2DT[3:0]=TCR25[3:0]+4 X tA
ADIN1
(when ENEXT=1)
ADIN2
(when ENEXT=1)
SAR_LATCH
(Internal Signal)
6 X tA
tA
6 X tA
1 X tA
3 X tA
3 X tA
3 X tA
SAR[6:0]
When ENSAR = 1
Figure 3. Analog-to-Digital State Machine Timing
相關(guān)PDF資料
PDF描述
AM79C930VCW PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
AM79C940VCW Media Access Controller for Ethernet (MACE)
AM79C940 Media Access Controller for Ethernet (MACE)
AM79C940JCW Media Access Controller for Ethernet (MACE)
AM79C940KCW Media Access Controller for Ethernet (MACE)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C930EVAL-HW 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Am79C930EVAL-HW - PCnet-Mobile Evaluation Kit
AM79C930VC/W 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
AM79C930VCW 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
AM79C940 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Media Access Controller for Ethernet (MACE)
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