Datasheet

bq24155
www.ti.com SLUS942 –FEBRUARY 2010
REGISTER DESCRIPTION
Table 3. Status/Control Register (Read/Write)
Memory Location: 00, Reset State: x1xx 0xxx
BIT NAME READ/WRITE FUNCTION
Write: TMR_RST function, write "1" to reset the safety timer (auto clear)
B7 (MSB) TMR_RST/ISEL Read/Write
Read: ISEL pin status, 0-ISEL pin at Low level, 1-ISEL pin at High level
B6 EN_STAT Read/Write 0-Disable STAT pin function, 1-Enable STAT pin function (default 1)
B5 STAT2 Read Only
00-Ready, 01-Charge in progress, 10-Charge done, 11-Fault
B4 STAT1 Read Only
B3 BOOST Read Only NA
B2 FAULT_3 Read Only
Charge mode: 000-Normal, 001-VBUS OVP, 010-Sleep mode, 011-Poor input
B1 FAULT_2 Read Only source or VBUS < UVLO, 100-Output OVP, 101-Thermal shutdown, 110-Timer
fault, 111-No battery
B0 (LSB) FAULT_1 Read Only
Table 4. Control Register (Read/Write)
Memory Location: 01, Reset State: 0011 0000 (30H)
BIT NAME READ/WRITE FUNCTION
B7 (MSB) Iin_Limit_2 Read/Write 00-USB host with 100-mA current limit, 01-USB host with 500-mA current limit,
10-USB host/charger with 800-mA current limit, 11-No input current limit
B6 Iin_Limit_1 Read/Write
(default 00)
B5 VLOWV_2
(1)
Read/Write 200-mV weak battery voltage threshold (default 1)
B4 VLOWV_1
(1)
Read/Write 100-mV weak battery voltage threshold (default 1)
1-Enable charge current termination, 0-Disable charge current termination
B3 TE Read/Write
(default 0)
B2 CE Read/Write 1-Charger is disabled, 0-Charger enabled (default 0)
B1 HZ_MODE Read/Write 1-High impedance mode, 0-Not high impedance mode (default 0)
B0 (LSB) OPA_MODE Read/Write 1-NA, 0-Charger mode (default 0)
(1) The range of the weak battery voltage threshold (V
(LOWV)
) is 3.4 V to 3.7 V and step of 100 mV (default 3.7 V).
Table 5. Control/Battery Voltage Register (Read/Write)
Memory Location: 02, Reset State: 0000 1010 (0AH)
BIT NAME READ/WRITE FUNCTION
B7 (MSB) V
O(REG5)
Read/Write Battery regulation voltage: 640mV (default 0)
B6 V
O(REG4)
Read/Write Battery regulation voltage: 320mV (default 0)
B5 V
O(REG3)
Read/Write Battery regulation voltage: 160mV (default 0)
B4 V
O(REG2)
Read/Write Battery regulation voltage: 80mV (default 0)
B3 V
O(REG1)
Read/Write Battery regulation voltage: 40mV (default 1)
B2 V
O(REG0)
Read/Write Battery regulation voltage: 20mV (default 0)
B1 NA Read/Write NA
B0 (LSB) NA Read/Write NA
Charge voltage range is 3.5 V to 4.44 V with the offset of 3.5 V and step of 20 mV (default is 3.54 V).
Table 6. Vender/Part/Revision Register (Read only)
Memory Location: 03, Reset State: 0100 x001
BIT NAME READ/WRITE FUNCTION
B7 (MSB) Vender2 Read Only Vender Code: bit 2 (default 0)
B6 Vender1 Read Only Vender Code: bit 1 (default 1)
B5 Vender0 Read Only Vender Code: bit 0 (default 0)
B4 PN1 Read Only Part Number Code: bit 1 (default 0)
B3 PN0 Read Only Part Number Code: bit 0 (default 0 for bq24151, default 1 for bq24155)
Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 21
Product Folder Link(s): bq24155