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| 型号： | ELANSC410 |
| 英文描述： | Single Synchronous Buck Pulse-Width Modulation (PWM) Controller; Temperature Range: 0°C to 70°C; Package: 16-QFN |
| 中文描述： | ElanSC410 - ElanSC410框图 |
| 文件页数： | 104/119页 |
| 文件大小： | 1167K |
| 代理商： | ELANSC410 |
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lanSC310 Microcontroller Data Sheet
85
PREL IMINARY
frequency. It is therefore required that the load capaci-
tance in the oscillator circuit is duplicated as closely as
possible to the manufacturer’s load capacitance speci-
fication.
The crystal load capacitance in the circuit consists of
the capacitor network C
O, CSTRAY, CD, and CG. This net-
work reduces to (C
O + CSTRAY) in parallel with the series
combination of C
D and CG. Therefore, the desired se-
ries combination of C
D and CG is equal to CL – (CO +
CSTRAY), where CL is the crystal manufacturer’s load ca-
pacitance specification.
C
STRAY is typically difficult to determine. Some value
can be assumed and experimentation will determine
the optimal value for CD and CG. In determining the ex-
ternal component values to provide the optimal operat-
ing frequency, there are some recommended limits to
ensure a reasonable start-up time for the oscillator cir-
cuit. These limits are shown in Table 43.
The series combination of CD and CG =
C
(
D
C
G
×)
C
D
C
G )
+
(
---------------------------
Table 43.
Recommended Oscillator Component
Value Limits
Minimum
Maximum
RF
14 M
18 M
RB
0
10 k
CD
10 pF
30 pF
CG
10 pF
30 pF
lanSC310 Microcontroller
X32IN (201)
X32OUT (202)
RF
RB
L1
C1
R1
CO
CD
CG
A
B
XTAL
CSTRAY
AB
Notes:
For board layout suggestions, refer to the lanSC310 Microcontroller Evaluation Board User’s Manual available in PDF format
on the AMD web site.
Figure 29.
X32 Oscillator Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ELANSC410-100AC | 制造商:Advanced Micro Devices 功能描述:MCU 16-Bit/32-Bit Elan CISC ROMLess 3.3V 292-Pin BGA |
| ELANSC410-100ACAD | 制造商:Advanced Micro Devices 功能描述: |
| ELANSC410-100AI | 制造商:AMD 制造商全称:Advanced Micro Devices 功能描述:Single-Chip, Low-Power, PC/AT-Compatible Microcontrollers |
| ELANSC410-33AC | 制造商:Advanced Micro Devices 功能描述:MCU 16-Bit/32-Bit Elan CISC 3.3V 292-Pin BGA |
| ELANSC410-33AI | 制造商:AMD 制造商全称:Advanced Micro Devices 功能描述:Single-Chip, Low-Power, PC/AT-Compatible Microcontrollers |
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