參數(shù)資料
型號(hào)： PPC405CR-3BC266C
廠商： APPLIEDMICRO INC
元件分類： 微控制器/微處理器
英文描述： PowerPC 405CR Embedded Processor
中文描述： 32-BIT, 266.66 MHz, RISC PROCESSOR, PBGA316
封裝： 27 X 27 MM, PLASTIC, EBGA-316
文件頁(yè)數(shù)： 39/42頁(yè)
文件大?。?/td> 446K
代理商： PPC405CR-3BC266C
PPC405CR – PowerPC 405CR Embedded Processor
Revision 1.02 – January 11, 2005
Data Sheet
AMCC
39
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 PPC405CR 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
to +3.3V or 10k
to
+5V. The recommended pull-down is 1K
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 func-
tions and strapping options. The signal names assigned to the pins for normal operation follow the pin number.
Table 16. Strapping Pin Assignments (Sheet 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
See Note.
W15
UART0_Tx
U13
UART0_DTR
V20
UART0_RTS
Choice 1; TUNE[5:0] = 010001
0
0
0
Choice 2; TUNE[5:0] = 010010
0
0
1
Choice 3; TUNE[5:0] = 010011
0
1
0
Choice 4; TUNE[5:0] = 010100
0
1
1
Choice 5; TUNE[5:0] = 010101
1
0
0
Choice 6; TUNE[5:0] = 010110
1
0
1
Choice 7; TUNE[5:0] = 010111
1
1
0
Choice 8; TUNE[5:0] = 100100
1
1
1
PLL Forward Divider
2
C16
DMAAck0
B17
DMAAck1
Bypass mode
0
0
Divide by 3
0
1
Divide by 4
1
0
Divide by 6
1
1
PLL Feedback Divider
2
B16
DMAAck2
A14
DMAAck3
Divide by 1
0
0
Divide by 2
0
1
Divide by 3
1
0
Divide by 4
1
1
PLB Divider from CPU
2, 3
B18
GPIO1[TS1E]
D16
GPIO2[TS2E]
Divide by 1
0
0
Divide by 2
0
1
Divide by 3
1
0
Divide by 4
1
1
OPB Divider from PLB
2
T4
HoldAck
U5
ExtAck
Divide by 1
0
0
Divide by 2
0
1
Divide by 3
1
0
Divide by 4
1
1
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