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参数资料
| 型号： | 405GP |
| 厂商： | Applied Micro Circuits Corp. |
| 英文描述： | Power PC 405GP Embedded Processor |
| 中文描述： | 405GP的Power PC嵌入式处理器 |
| 文件页数： | 51/59页 |
| 文件大小： | 782K |
| 代理商： | 405GP |
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405GP – Power PC 405GP Embedded Processor
AMCC
55
Revision 2.03 – September 7, 2007
Data Sheet
Strapping
When the SysReset input is driven low by an external device (system reset), the state of certain I/O pins is read to
enable default initial conditions prior to PPC405GP start-up. The actual capture instant is the nearest SysClk edge
before the deassertion of reset. These pins must be strapped using external pull-up (logical 1) or pull-down
(logical 0) resistors to select the desired default conditions. The recommended pull-up is 3k
Ω to +3.3V or 10kΩ to
+5V. The recommended pull-down is 1K
Ω to GND. These pins are use for strap functions only during reset. They
are used for other signals during normal operation. The following table lists the strapping pins along with their
functions and strapping options. The pin for the 456-ball package is listed first (for example, AF3), followed by the
corresponding pin for the 413-ball package (for example, U8), which appears as AF3/U8. The signal names
assigned to the pins for normal operation follow the pin numbers.
PPC405GP Strapping Pin Assignments (Part 1 of 2)
Function
Option
Ball Strapping
PLL Tuning 1
for 6
≤ M ≤ 7 use choice 3
for 7 < M
≤ 12 use choice 5
for 12 < M
≤ 32 use choice 6
AF3/U8
UART0_Tx
AF2/T8
UART0_DTR
AD16/AB15
UART0_RTS
Choice 1; TUNE[5:0] = 010001
0
Choice 2; TUNE[5:0] = 111011
0
1
Choice 3; TUNE[5:0] = 010011
0
1
0
Choice 4; TUNE[5:0] = 111101
0
1
Choice 5; TUNE[5:0] = 010101
1
0
Choice 6; TUNE[5:0] = 010110
1
0
1
Choice 7; TUNE[5:0] = 111110
1
0
Choice 8; TUNE[5:0] = 100100
1
PLL Forward Divider 2
D16/A17
DMAAck0
B15/B14
DMAAck1
Bypass mode
0
Divide by 3
0
1
Divide by 4
1
0
Divide by 6
1
PLL Feedback Divider 2
B14/A15
DMAAck2
C12/A8
DMAAck3
Divide by 1
0
Divide by 2
0
1
Divide by 3
1
0
Divide by 4
1
PLB Divider from CPU 2
P25/R23
EMCTxD3
L24/J22
EMCTxD2
Divide by 1
0
Divide by 2
0
1
Divide by 3
1
0
Divide by 4
1
OPB Divider from PLB 2
L25/K21
EMCTxD1
J26/F22
EMCTxD0
Divide by 1
0
Divide by 2
0
1
Divide by 3
1
0
Divide by 4
1
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