BQ27621-G1_16 Datasheet, PDF (6/26 Pages) Texas Instruments – System-Side Fuel Gauge With Dynamic Voltage Correlation

bq27621-G1
SLUSBB3E – DECEMBER 2013 – REVISED JANUARY 2016
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I²C-Compatible Interface Communication Timing Characteristics (continued)
T_A = –40°C to 85°C; typical values at T_A = 30°C and V_REGIN = 3.6 V (unless otherwise noted) (Force Note1)⁽¹⁾
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX
t_w(L)
SCL pulse duration (low)
4.7
t_w(H)
SCL pulse duration (high)
4
t_su(STA)
Setup for repeated start
4.7
t_su(DAT)
Data setup time
Host drives SDA
250
t_h(DAT)
Data hold time
Host drives SDA
0
t_su(STOP)
Setup time for stop
4
t_(BUF)
Bus free time between stop and
start
Includes Command Waiting Time
66
t_f
SCL/SDA fall time ⁽¹⁾
300
t_r
SCL/SDA rise time ⁽¹⁾
300
f_SCL
Clock frequency⁽²⁾
100
Fast Mode (400 kHz)
t_d(STA)
Start to first falling edge of SCL
600
t_w(L)
SCL pulse duration (low)
1300
t_w(H)
SCL pulse duration (high)
600
t_su(STA)
Setup for repeated start
600
t_su(DAT)
Data setup time
Host drives SDA
100
t_h(DAT)
Data hold time
Host drives SDA
0
t_su(STOP)
Setup time for stop
600
t_(BUF)
Bus free time between stop and
start
Includes Command Waiting Time
66
t_f
SCL/SDA fall time ⁽¹⁾
300
t_r
SCL/SDA rise time ⁽¹⁾
300
f_SCL
Clock frequency⁽²⁾
400
UNIT
µs
µs
µs
ns
ns
µs
µs
ns
ns
kHz
ns
ns
ns
ns
ns
ns
ns
µs
ns
ns
kHz
(2) If the clock frequency (f_SCL) is > 100 kHz, use 1-byte write commands for proper operation. All other transactions types are supported at
400 kHz. (Refer to I²C Interface and I²C Command Waiting Time).
t_SU(STA)
t_w(H)
t_w(L)
t_f
t_r
t_(BUF)
SCL
SDA
t_d(STA)
t_f
t_r
t_h(DAT)
t_su(DAT)
t_su(STOP)
REPEATED
START
STOP
START
Figure 1. I²C-Compatible Interface Timing Diagrams
6
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