BQ34Z950 Datasheet, PDF (12/28 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION ENABLED WITH IMPEDANCE TRACK WITH OPTIONAL DQ INTERFACE

bq34z950
SLUSBF0A – APRIL 2013 – REVISED MAY 2013
DQ 1-WIRE INTERFACE
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DQ TIMING SPECIFICATIONS
V_DD = 2.4 V to 2.6 V, T_A = –40°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
t_(CYCH)
Cycle time, host to bq34z950
See ⁽¹⁾
t_(CYCB)
Cycle time, bq34z950 to host
t_(STRH)
Start hold, host to bq34z950
t_(STRB)
Start hold, bq34z950 to host
t_(DSU)
Data setup
t_(DH)
Data hold
t_(DV)
Data valid
t_(SSU)
Stop setup
t_(SH)
Stop hold
t_(SV)
Stop valid
t_(B)
Break
t_(BR)
Break recovery
MIN TYP MAX UNIT
3
ms
3
6
ms
5
ns
500
750
μs
μs
750
μs
1.5
ms
2.25
ms
700
μs
2.95
ms
3
ms
1
ms
(1) The open-drain DQ pin should be pulled to at least V_CC by the host system for proper DQ operation. DQ may be left floating if the serial
interface is not used.
DQ
(R/W 1)
DQ
(R/W 0)
DQ
(BREAK)
t_(STRH)
t_(STRB)
t_(DSU)
t_(DV)
t_(DH)
t_(SSU)
t_(SV)
t_(SH)
t_(CYCH), t_(CYCB), t_(B)
Figure 2. DQ Timing Diagram
t_(BR)
T0269-01
DQ timing for this device is selectable by adjusting values in Data Flash Sub Class 0x113. See Figure 3 for an
overview of the flash values.
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