參數(shù)資料
型號(hào)： 80931HA
廠商： Intel Corp.
英文描述： Universal Serial Bus Peripheral Controller(通用串行總線HUB外設(shè)微控制器)
中文描述： 通用串行總線外設(shè)控制器（通用串行總線集線器外設(shè)微控制器）
文件頁(yè)數(shù)： 24/26頁(yè)
文件大?。?/td> 195K
代理商： 80931HA
8x931AA, 8x931HA USB Peripheral Controller
24
Advance Information Datasheet
6.0
Thermal Characteristics
The microcontroller operates over the commercial temperature range from 0oC to 70oC. All
thermal impedance data (see Table 17) is approximate for static air conditions at 1 watt of power
dissipation. Values change depending on operating conditions and application requirements. The
Intel Packaging Handbook (order number 240800) describes Intel’s thermal impedance test
methodology. The Components Quality and Reliability Handbook (order number 210997) provides
quality and reliability information.
7.0
Design Considerations
7.1
Low Clock Mode Frequency
During low clock mode, the internal clock F
distributed to the CPU and peripherals is 3 MHz.
Peripheral timing and external bus accesses (including instruction fetch and data read/write) are
affected. Refer to Table 10 and Table 11 for clock rates.
Figure 12. Float Waveforms
A4117-01
V
LOAD
+ 0.1 V
V
LOAD
– 0.1 V
Timing Reference
Points
V
LOAD
V
OH
– 0.1 V
V
OL
+ 0.1 V
For timing purposes, a port pin is no longer floating when a
100 mV change from load voltage occurs and begins to float
when a 100 mV change from the loading V
OH
/V
OL
level occurs
with I
OL/
I
OH
=
± 1 mA.
Table 19. Thermal Characteristics
Package Type
θ
JA
θ
JC
68-pin PLCC
N/A
N/A
Data unavailable at time of publication.
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