参数资料
型号: 20-151-0178
厂商: Rabbit Semiconductor
文件页数: 20/162页
文件大小: 0K
描述: CABLE CONVERTER RS-232 TO USB
标准包装: 1
附件类型: USB 至 RS232 适配器
适用于相关产品: 基于 Rabbit 的板
产品目录页面: 619 (CN2011-ZH PDF)
其它名称: 20-151-0178-ND
316-1181
Figure 2.6 Test Points for Checking Voltage Levels on the PowerCore 3800
C1
R5 R9
C3 R8
TP11
TP10
U6
TP9
CAUTION: HOT!
L1
VBAT
R30
RT1
R1
DS1
C2
U1
D1
R6
R7
R17
Q2
R22
R21
R16
R23
R28
R27
R25
R32
C21
R39
U9
U11
DS2
C8
Q1
T1
R24
U4
U5
R36 R41
R31 C30
C19
R47
R43
R44
D4
D5
R56
TVS1
C34
L7
R4
J1
C6
C7
JP1
C18
C17
R34
R33
D2
D3
U10
Y2
C67 R49
R53
R51
U12
D
U13
D7
R57
R58
D6
D8
R59
R60
A
B
C
TVS2
SG2
J3
Y1
R42
C38
J2
U15
R2
R3
C37
E F
Table 2-6. Description for Test Points in Figure 2.6
Test Points
A , B , C : These pins are the center-
tapped power supply input. “B” is
ground. Both “A” and “C” measure
the voltage coming from the external
power supply
D : This capacitor terminal is an easy
place to access the board-level
ground.
E , F : These pins are the output and
Expected Measurement
From B to A, 12 V AC or higher
From B to C, 12 V AC or higher
From D to E, approx. 3.45 V DC
From D to F, approx. 5 V DC
input, respectively, of the 3.45 V
regulator.
If you see the message “Could not open serial port”
? Another program (for example, a terminal emulator) is already using the COM port you chose for
Dynamic C or the programming cable is not attached to the correct COM port on the PC. To change the
COM port Dynamic C will use, choose Options > Project Options and click the Communications tab.
Select another COM port from the Serial Port pull-down menu.
If you see the message “Timeout while waiting for response from target”
? Check the programming and power cable connections.
? You might have a baud rate mismatch problem. Choose Options > Project Options and click the Com-
munications tab. Select a different value in the Debug Baud Rate dropdown menu.
? If you have a very slow PC or are doing other CPU-intensive tasks at the same time Dynamic C is try-
ing to download, you might get other timeout error messages. Dynamic C needs a lot of CPU time dur-
ing a download. Try stopping the other tasks to see if it helps.
14
Getting Started
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