參數(shù)資料
型號(hào)： 80930AD
廠商： Intel Corp.
英文描述： Universal Serial Bus Microcontroller(通用串行總線微控制器)
中文描述： 通用串行總線控制器（通用串行總線微控制器）
文件頁(yè)數(shù)： 16/38頁(yè)
文件大?。?/td> 226K
代理商： 80930AD
12
ADVANCE INFORMATION
8x930Ax UNIVERSAL SERIAL BUS (USB) MICROCONTROLLER
5.1
Operating Frequencies
Figure 5. Clock Circuit
Table 8. Frequency Selection and Operating Frequency
PLLSEL2
Pin 43
PLLSEL1
Pin 42
PLLSEL0
Pin 44
USB Rate
(Low
Speed
or Full
Speed)
8x930Ax
Internal
Frequency
for CPU
and
Peripherals
(F
)
(5)
XTAL1
External
Frequency
(F
OSC
)
Number of
XTAL1
Clocks
(T
)
in One
StateTime
(4)
Comments
0
0
1
1.5 Mbps
(LS)
3 MHz
6 MHz
2 T
OSC
/state
PLL Off
1
0
0
1.5 Mbps
(LS)
6 MHz (3)
12 MHz
2 T
OSC
/state PLL Off
1
1
0
12 Mbps
(FS)
12 MHz (3)
12 MHz
1 T
OSC
/state PLL On
NOTES:
1.
2.
3.
Other PLLSELxcombinations are not valid.
The sampling rate is 4X the USB rate.
The 8x930AxCPU and peripherals frequency is 3 MHz (low clock mode) until firmware disables the
low clock mode.
The number of XTAL clocks in one state depends on the PLLSELx selections. When the CPU is oper-
ating at low clock mode (3 MHz), there are four T
per state for the PLLSEL2:1:0 = 100 and 110.
The AC timing specification (Table 11) defines the following symbol: CPU frequency = F
CLK
= 1/T
CLK
.
4.
5.
Clock
Generator
A5135-01
XTAL1
XTAL2
F
(6 or 12 MHz)
PCON.0
(Idle Mode)
IDL
PCON.1
(Powerdown)
0
1
PD
÷ 2
1
0
2
PLLSEL
F
CLK
CPU
On-chip
Peripherals
Internal Clock
PCON.5
(Low-clock Mode)
LC
0
1
3 MHz
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