参数资料
型号: ST40RA150XH6
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 150 MHz, RISC PROCESSOR, PBGA372
封装: 27 X 27 MM, BGA-372
文件页数: 27/90页
文件大小: 672K
代理商: ST40RA150XH6
5 Clock generation
ST40RA166
33/88
5.3.1
CLOCKGENA_2x PCI (PCI_DIV_BYPASS = 0)
5.3.2
Division ratios on CLOCKGENA_2x
5.4
Setting clock frequencies
Table 17 shows valid FRQCR ratios and the associated clock frequencies for derived clocks.
Reset mode
MODE[4:3]
Reset value
PLL2 frequency
00
0x7938 B012
528 MHz
01
0x7938 B012
528 MHz
10
0x7938 B012
528 MHz
11
0x0938 B012
0 MHz
Table 15: CLOCKGENA PLL2 reset values (PCI_DIV_BYPASS = 0)
Mode
MODE[4:3]
Divide ratio selected
PCI_BUS_CLK freq.
00
8
66 MHz
01
16
33 MHz
10
21
25.14 MHz
11
-
0 MHz
Table 16: CLOCKGENA_PLL2 PCI reset division ratios.
CLOCKGENA.FRQCR and
CLOCKGENB.FRQCR
ST40RA166 codified ratios
Clock ratios
Lower 9 bit
Available
on start up
CPU_
CLK
BUS_
CLK
PER_
CLK
CPU_
CLK
BUS_
CLK
PER_
CLK
0x000
11
1/2
1
1/2
0x002
1/4
1
1/4
0x004
1/8
1
1/8
0x008
MODE
6
1
1/2
1
1/2
0x00A
MODE
[4:5]
1/4
1
1/2
1/4
0x00C
1/2
1/8
1
1/2
1/8
0x011
2/3
1/6
1
2/3
1/6
0x013
MODE
[2:3]
1
2/3
1/3
1
2/3
1/3
0x01A
MODE
0
1/2
1/4
1
1/2
1/4
0x01C
1/8
1
1/2
1/8
0x023
MODE
1
2/3
1/3
1
2/3
1/3
Table 17: Valid FRQCR values and their ratios
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