參數(shù)資料
型號(hào)： IBM25PPC750GLECR5HA3T
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 1000 MHz, RISC PROCESSOR, CBGA292
封裝： 21X 21 MM, 1 MM PITCH, CERAMIC, BGA-292
文件頁(yè)數(shù)： 43/76頁(yè)
文件大?。?/td> 1031K
代理商： IBM25PPC750GLECR5HA3T
Datasheet
IBM PowerPC 750GL RISC Microprocessor
DD1.X
Preliminary
System Design Information
Page 48 of 74
750GL_ds_body.fm 1.2
March 13, 2006
5.1.4 PLL Configuration
Table 5-2 shows the PLL configuration for the 750GL for nominal frequencies.
Table 5-2. 750GL Microprocessor PLL Configuration
PLL_CFG [0:4]
Processor to Bus
Frequency Ratio
(PTBFR)
Frequency Range Supported by VCO Having an Example Range of...
SYSCLK1 (MHz)
Core (MHz)
Binary
Decimal
Minimum
(SYSCLKMIN)
Maximum
(SYSCLKMAX)
Minimum
(Core FrequencyMIN)
Maximum
(Core FrequencyMAX)
00000
0
Off2
N/A
Off
00001
1
Off2
N/A
Off
00010
2
PLL Bypass3
N/A
00011
3
PLL Bypass3
N/A
00100
4
2×4
N/A
00101
5
2.5×4
200
500
00110
6
3×4
167
200
500
600
00111
7
3.5×4
143
200
500
700
01000
8
4×
125
200
500
800
01001
9
4.5×
111
200
500
900
01010
10
5×
100
200
500
1000
01011
11
5.5×
91
182
500
1000
01100
12
6×
83
166
500
1000
01101
13
6.5×
77
154
500
1000
01110
14
7×
71
143
500
1000
01111
15
7.5×
67
133
500
1000
10000
16
8×
62
125
500
1000
10001
17
8.5×
59
118
500
1000
10010
18
9×
55
111
500
1000
10011
19
9.5×
51
105
500
1000
10100
20
10×
50
100
500
1000
10101
21
11×
45
91
500
1000
10110
22
12×
42
83
500
1000
10111
23
13×
38
77
500
1000
11000
24
14×
36
71
500
1000
11001
25
15×
33
66
500
1000
Notes:
1. The SYSCLK frequency equals the core frequency divided by the processor-to-bus frequency ratio (PTBFR).
2. In clock-off mode, no clocking occurs inside the 750GL regardless of the SYSCLK input.
3. In PLL-bypass mode, the SYSCLK input signal clocks the internal processor directly, the PLL is disabled, and the bus mode is set
for 1:1 mode operation. This mode is intended for factory use only.
The AC timing specifications given in the document do not apply in PLL-bypass mode.
4. The 2×–3.5× processor-to-bus ratios are currently not supported when miss-under-miss is enabled (HID0(14) = '1').
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