ST92F120JR9T datasheet(312/320 Pages) STMICROELECTRONICS

312 / 320 page

312/320

ST92F120 - ELECTRICAL CHARACTERISTICS

I2C/DDC-BUS TIMING TABLE

(VDD =5V ± 10%, TA = –40°C to +105°C, CLoad = 50pF, fINTCLK = 24MHz, unless otherwise specified)

Note:

(1) The device must internally provide a hold time of at least 300 ns for the SDA signal in order to bridge the undefined region of the falling

edge of SCL

(2) The maximum hold time of the START condition has only to be met if the interface does not stretch the low period of SCL signal

Legend:

Tck = INTCLK period = OSCIN period when OSCIN is not divided by 2;

2 x OSCIN period when OSCIN is divided by 2;

OSCIN period x PLL factor when the PLL is enabled.

Cb = total capacitance of one bus line in pF

FREQ[ 2:0] = Frequency bits value of I2C Own Address Register 2 (I2COAR2)

Symbol

Parameter

Formula

Protocol Specifications

Unit

Standard I2CFast I2C

Min

Max

Min

Max

fINTCLK

Internal Frequency (Slave Mode)

2.5

MHz

fSCL

SCL clock frequency

100

400

kHz

TBUF

Bus free time between a STOP and START

condition

4.7

1.3

µs

THIGH

SCL clock high period

4.0

0.6

µs

TLOW

SCL clock low period

Standard Mode

Fast Mode

THIGH –3 x Tck

2x (THIGH – 3 x Tck)

4.7

1.3

µs

THD:STA

Hold time START condition. After this period,

the first clock pulse is generated

TLOW + Tck

4.0

0.6

µs

TSU:STA Set-up time for a repeated START condition

TLOW +THIGH –THD:STA

4.7

0.6

µs

THD:DAT Data hold time

FREQ[2:0] = 000

FREQ[2:0] = 001

FREQ[2:0] = 010

FREQ[2:0] = 011

3x Tck

4x Tck

10 x Tck

0 (1)

0.9 (2)

TSU:DAT

Data set-up time

(Without SCL stretching)

TLOW –THD:DAT

250

100

Data set-up time

(With SCL stretching)

FREQ[2:0] = 000

FREQ[2:0] = 001

FREQ[2:0] = 010

FREQ[2:0] = 011

7x Tck

15 x Tck

31 x Tck

Rise time of both SDA and SCL signals

1000

20+

0.1Cb

Fall time of both SDA and SCL signals

300

20+

0.1Cb

TSU:STO Set-up time for STOP condition

TLOW +THIGH –THD:STA

4.0

0.6

Capacitive load for each bus line

400

ST92F120JR9T bảng dữ liệu(PDF) 312 Page - STMicroelectronics

ST92F120JR9T bảng dữ liệu(HTML) 312 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL