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| BQ27546-G1 Datasheet, PDF (7/38 Pages) Texas Instruments – nullSingle-Cell Li-Ion Battery Fuel Gauge | |||
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www.ti.com
bq27546-G1
SLUSC53A â MAY 2015 â REVISED DECEMBER 2015
HDQ Communication Timing Characteristics (continued)
TA = â40°C to 85°C, CREG = 0.47 μF, 2.45 V < VREGIN = VBAT < 5.5 V; typical values at TA = 25°C and VREGIN = VBAT = 3.6 V
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN NOM MAX UNIT
t(DW1)
t(HW0)
t(DW0)
t(RSPS)
t(B)
t(BR)
t(RISE)
bq27546-G1 sends 1 to host
Host sends 0 to bq27546-G1
bq27546-G1 sends 0 to host
Response time, bq27546-G1 to host
Break time
Break recovery time
HDQ line rising time to logic 1 (1.2 V)
32
50 μs
86
145 μs
80
145 μs
190
950 μs
190
μs
40
μs
950 ns
8.14 I2C-Compatible Interface Timing Characteristics
TA = â40°C to 85°C, CREG = 0.47 μF, 2.45 V < VREGIN = VBAT < 5.5 V; typical values at TA = 25°C and VREGIN = VBAT = 3.6 V
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN NOM MAX UNIT
tr
tf
tw(H)
tw(L)
tsu(STA)
td(STA)
tsu(DAT)
th(DAT)
tsu(STOP)
tBUF
fSCL
SCL/SDA rise time
SCL/SDA fall time
SCL pulse width (high)
SCL pulse width (low)
Setup for repeated start
Start to first falling edge of SCL
Data setup time
Data hold time
Setup time for stop
Bus free time between stop and start
Clock frequency (1)
600
1.3
600
600
1000
0
600
66
300 ns
300 ns
ns
μs
ns
ns
ns
ns
ns
μs
400 kHz
(1) If the clock frequency (fSCL) is > 100 kHz, use 1-byte write commands for proper operation. All other transactions types are supported at
400 kHz. (Refer to I2C Interface.)
t(B)
t(BR)
(a) Break and Break Recovery
t(RISE)
1.2V
(b) HDQ line rise time
t(HW1)
t(HW0)
t(CYCH)
(c) Host Transmitted Bit
t(DW1)
t(DW0)
t(CYCD)
(d) Gauge Transmitted Bit
Break
7-bit address
1-bit
R/W
8-bit data
t(RSPS)
(e) Gauge to Host Response
Figure 1. HDQ Timing Diagrams
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: bq27546-G1
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