BQ24187 Datasheet, PDF (27/44 Pages) Texas Instruments – 1A USB-OTG Support

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Not Recommended for New Designs
bq24187
SLUSBM0 – APRIL 2014
Table 3. Control Register (Read/Write)
Memory Location: 01, Reset State: 1xxx 1110
BIT
B7 (MSB)
B6
B5
NAME
RESET
IN_LIMIT_2
IN_LIMIT_1
B4
IN_LIMIT_0
B3
B2
B1
B0 (LSB)
EN_STAT
TE
CE
HZ_MODE
READ/WRITE
Write only
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
FUNCTION
Write: 1-Reset all registers to default values
0-No effect
Read: always get “1”
000-USB2.0 host with 100mA current limit
001-USB3.0 host with 150mA current limit
010 – USB2.0 host with 500mA current limit
011 – USB3.0 host/charger with 900mA current limit
100 – Charger with 1500mA current limit
101—NA
110 – Charger with 2500mA current limit
111-NA (default xxx⁽¹⁾)
0-Disable STAT function (STAT only shows faults)
1-Enable STAT function (default 1)
0-Disable charge current termination
1-Enable charge current termination (default 1)
0-Charger enabled
1-Charger is disabled (default 0)
0-Not high impedance mode
1-High impedance mode (default 0)
(1) When in DEFAULT mode, the D+/D– inputs or PSEL determine the default input current limit.
RESET Bit
The RESET bit in the control register (0x01h) is used to reset all the charge
parameters. Write “1” to RESET bit to reset all the registers to default values and
place the bq24187 into DEFAULT mode and turn off the watchdog timer. The RESET
bit is automatically cleared to zero once the bq24187 enters DEFAULT mode.
CE Bit
(Charge Enable)
The CE bit in the control register (0x01h) is used to disable or enable the charge
process. A low logic level (0) on this bit enables the charge and a high logic level (1)
disables the charge.
HZ_MODE Bit
The HZ_MODE bit in the control register (0x01h) is used to disable or enable the high
(High Impedance Mode impedance mode. A low logic level (0) on this bit enables the IC and a high logic level
Enable)
(1) puts the IC in a low quiescent current state called high impedance mode. When in
high impedance mode, the converter is off.
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