參數(shù)資料
型號(hào): AT43USB325E-AC
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: Multimedia USB Keyboard Controller with Embedded Hub
中文描述: 8-BIT, 12 MHz, RISC MICROCONTROLLER, PQFP64
封裝: 1.40 MM HEIGHT, PLASTIC, MS-026-ACB, LQFP-64
文件頁(yè)數(shù): 98/109頁(yè)
文件大小: 643K
代理商: AT43USB325E-AC
98
3355C–USB–4/05
AT43USB325
Figure 9-1.
Synchronous Data Timing
Note:
1. With external 27
series resistor.
Figure 9-2.
Full-speed Load
Table 9-7.
USB Driver Characteristics, Full Speed Operation
Symbol
Parameter
Condition
Min
Max
Unit
TR
Rise time
C
L
= 50 pF
4
20
ns
TF
Fall time
C
L
= 50 pF
4
20
ns
TRFM
TR/TF matching
90
110
%
ZDRV
Driver output resistance
(1)
Steady state drive
28
44
Table 9-8.
USB Driver Characteristics, Low-speed Operation
Symbol
Parameter
Condition
Min
Max
Unit
TR
Rise time
CL = 200 - 600 pF
75
300
ns
TF
Fall time
CL = 200 - 600 pF
75
300
ns
TRFM
TR/TF matching
80
125
%
SCK
MOSI
MISO
SSN
t
CSH
t
CS
t
H0
t
DIS
HI-Z
t
V
t
H
VALID IN
HI-Z
t
SU
t
WH
t
WL
t
CSS
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
TxD+
TxD-
R
S
R
S
C
L
C
L
C
L
= 50 pF
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