BQ25708 datasheet(28/77 Pages) TI1

28 / 77 page

LOW

HIGH

SMBCLK

SMBDATA

SU:STA

HD:STA

SU:DAT

HD:DAT

SU:STO

BUF

bq25708

SLUSCU2 – NOVEMBER 2017

www.ti.com

Product Folder Links: bq25708

Submit Documentation Feedback

Programming (continued)

(1)

Master to slave

(2)

S = Start condition or repeated start condition

(3)

W = Write bit (logic-low)

(4)

Slave to master (shaded gray)

(5)

ACK = Acknowledge (logic-low)

(6)

P = Stop condition

8.5.1.1 SMBus Write-Word and Read-Word Protocols

Table 4. Write-Word Format

(1) (2)

SLAVE

ADDRESS(1)

(1) (3)

ACK

(4) (5)

COMMAND

BYTE(1)

ACK

(4) (5)

LOW DATA

BYTE(1)

ACK

(4) (5)

HIGH DATA

BYTE(1)

ACK

(4) (5)

(1) (6)

7 bits

8 bits

MSB LSB

(1)

Master to slave

(2)

S = Start condition or repeated start condition

(3)

W = Write bit (logic-low)

(4)

Slave to master (shaded gray)

(5)

ACK = Acknowledge (logic-low)

(6)

R = Read bit (logic-high)

(7)

NACK = Not acknowledge (logic-high)

(8)

P = Stop condition

Table 5. Read-Word Format

S(1)

(2)

SLAVE

ADDRESS(1)

(1) (3)

ACK

(4) (5)

COMMAND

BYTE(1)

ACK

(4) (5)

S(1)

(2)

SLAVE

ADDRESS(1)

R(1)

(6)

ACK

(4) (5)

LOW DATA

BYTE(4)

ACK

(1) (5)

HIGH DATA

BYTE(4)

NACK

(1) (7)

(1) (8)

7 bits

8 bits

7 bits

8 bits

MSB LSB

8.5.1.2 Timing Diagrams

A = Start condition

H = LSB of data clocked into slave

B = MSB of address clocked into slave

I = Slave pulls SMBDATA line low

C = LSB of address clocked into slave

J = Acknowledge clocked into master

D = R/W bit clocked into slave

K = Acknowledge clock pulse

E = Slave pulls SMBDATA line low

L = Stop condition, data executed by slave

F = ACKNOWLEDGE bit clocked into master

M = New start condition

G = MSB of data clocked into slave

Figure 11. SMBus Write Timing

BQ25708 Folha de dados(PDF) 28 Page - Texas Instruments

BQ25708 Folha de dados(HTML) 28 Page - Texas Instruments

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

Folha de dados Download

Ligação URL