參數(shù)資料
型號(hào): PIC16F77
廠商: Microchip Technology Inc.
英文描述: 40-Pin 8-Bit CMOS FLASH Microcontrollers(40腳、8位CMOS 閃速微控制器)
中文描述: 40引腳8位CMOS閃存微控制器(40腳,8位的CMOS閃速微控制器)
文件頁數(shù): 142/170頁
文件大小: 3150K
代理商: PIC16F77
PIC16F7X
DS30325A-page 142
Advance Information
2000 Microchip Technology Inc.
TABLE 15-9:
I
2
C BUS DATA REQUIREMENTS
Param.
No.
Sym
Characteristic
Min
Max
Units
Conditions
100*
T
HIGH
Clock high time
100 kHz mode
4.0
μ
s
Device must operate at a
minimum of 1.5 MHz
Device must operate at a
minimum of 10 MHz
400 kHz mode
0.6
μ
s
SSP Module
100 kHz mode
1.5T
CY
4.7
101*
T
LOW
Clock low time
μ
s
Device must operate at a
minimum of 1.5 MHz
Device must operate at a
minimum of 10 MHz
400 kHz mode
1.3
μ
s
SSP Module
100 kHz mode
400 kHz mode
1.5T
CY
20 + 0.1Cb
102*
T
R
SDA and SCL rise
time
1000
300
ns
ns
Cb is specified to be from
10-400 pF
103*
T
F
SDA and SCL fall
time
100 kHz mode
400 kHz mode
300
300
ns
ns
20 + 0.1Cb
Cb is specified to be from
10-400 pF
Only relevant for Repeated
START condition
After this period the first
clock pulse is generated
90*
T
SU
:
STA
START condition
setup time
START condition
hold time
100 kHz mode
400 kHz mode
100 kHz mode
400 kHz mode
4.7
0.6
4.0
0.6
0
0
250
100
4.7
0.6
4.7
1.3
0.9
3500
μ
s
μ
s
μ
s
μ
s
ns
μ
s
ns
ns
μ
s
μ
s
ns
ns
μ
s
μ
s
91*
T
HD
:
STA
106*
T
HD
:
DAT
Data input hold time 100 kHz mode
400 kHz mode
100 kHz mode
400 kHz mode
100 kHz mode
400 kHz mode
100 kHz mode
400 kHz mode
100 kHz mode
400 kHz mode
107*
T
SU
:
DAT
Data input setup
time
STOP condition
setup time
Output valid from
clock
Bus free time
(Note 2)
92*
T
SU
:
STO
109*
T
AA
(Note 1)
110*
T
BUF
Time the bus must be free
before a new transmission
can start
Cb
Bus capacitive loading
400
pF
* These parameters are characterized but not tested.
Note 1:
As a transmitter, the device must provide this internal minimum delay time to bridge the undefined region
(min. 300 ns) of the falling edge of SCL to avoid unintended generation of START or STOP conditions.
2:
A fast mode (400 kHz) I
2
C-bus device can be used in a standard mode (100 kHz) I
2
C bus system, but the
requirement Tsu:DAT
250 ns must then be met. This will automatically be the case if the device does not
stretch the LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL signal, it
must output the next data bit to the SDA line T
R
max.+tsu;DAT = 1000 + 250 = 1250 ns (according to the
standard mode I
2
C bus specification), before the SCL line is released.
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