參數(shù)資料
型號(hào)： 935073600551
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MICROCONTROLLER, PQFP44
封裝： 10 X 10 X 1.75 MM, PLASTIC, QFP-44
文件頁數(shù)： 54/80頁
文件大?。?/td> 446K
代理商： 935073600551
1997 Dec 15
58
Philips Semiconductors
Product specication
8-bit microcontrollers
P83C524; P80C528; P83C528
22 I2C CHARACTERISTICS (BIT-LEVEL)
Notes
1. At fCLK = 3.5 MHz, this evaluates to 14 × 286 ns = 4 s, i.e. the bit-level I2C interface can respond to the I2C protocol
for fCLK ≥3.5 MHz.
2. This parameter is determined by the user software, it has to comply with the I2C specification.
3. This value gives the auto-clock pulse length which meets the I2C specification for the specified XTAL1 clock
frequency range. Alternatively, the SCL pulse may be timed by software.
4. Spikes on SDA and SCL lines with a duration of less than 4
× fCLK will be filtered out.
5. The RISE time is determined by the external bus line capacitance and pull-up resistor, it must be
≤1 s.
6. The maximum capacitance on bus lines SDA and SCL is 400 pF.
SYMBOL
PARAMETER
INPUT
OUTPUT
I2C SPEC
UNIT
SCL timing
tHD;STA
START condition hold time
≥ 14 tCK; note 1
note 2
≥ 4.0
s
tLOW
SCL LOW time
≥ 16 tCK
note 2
≥ 4.7
s
tHIGH
SCL HIGH time
≥ 14 tCK; note 1
≥ 80 tCK; note 3
≥ 4.0
s
tRC
SCL RISE time
≤ 1; note 4
note 5
≤ 1.0
s
tFC
SCL FALL time
≤ 0.3; note 4
≤ 0.3; note 6
≤ 0.3
s
SDA timing
tSU;DAT
data set-up time
≥ 250 ns
note 2
≥ 250
ns
tHD;DAT
data hold time
≥ 0 ns
note 2
≥ 0ns
tSU;STA
repeated START set-up time
≥ 14 tCK; note 1
note 2
≥ 4.7
s
tSU;STO
STOP condition set
up time
≥ 14 tCK; note 1
note 2
≥ 4.0
s
tBUF
bus free time
≥ 14 tCK; note 1
note 2
≥ 4.7
s
tRD
SDA RISE time
≤ 1; note 4
note 5
≤ 1.0
s
tFD
SDA FALL time
≤ 300 ns; note 4
≤ 0.3; note 6
≤ 0.3
s
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