STBC21 Datasheet, PDF (30/54 Pages) STMicroelectronics – LI+ battery charger with thermal regulation

Register configuration and access mode description
STBC21
Appendix A Register configuration and access mode
description
Table 10. Configuration registers map
REG/BIT
B7
B6
B5
B4
00H
AMR
TIMER-3
01H
Reserved
Reserved ISET3
02H
CV-4
03H
Th
CV-3
04H
Reserved
Hys
05H
LF45
LD7 LD45
06H
Reserved
LD6
07H
Reserved
B3
B2
B1
B0
TIMER-2
CV-2
Th-h
Tl
ISET1
CV-1
LD3
LF267
LD2
DUTY mode
CV4-Iset2 CV3-Iset2 CV2-Iset2 _CV1-Iset2
Table 11. Control registers map
REG/
BIT
B7
B6
B5
B4
B3
B2
B1
B0
10H NVM Busy
NVM
check
NVM command
11H VCC_uvlo VCC_ovp IBAT_ocp Batt_ovp
Batt_uvlo
Batt_hot
Batt_detect_KO
Batt_no_
conn
12H
ASD_Mode
Thermal Batt temp Batt temp
protection alarm alarm
Batt_temp_soc
Timer2
expired
Timer1 expired
0V_Chrg
_alarm
13H Customer_ en CE Reserved Reserved SW_chrg_alarm
SW_chrg_status
14H
Batt_temp_range
Reserved Iset2_half Vfloat_05 Vfloat_10 Vfloat_20
The STBC21 has two different access modes to the internal registers: user mode and
customer mode.
User mode
At power-on the STBC21 enters user mode. Only Reg11H and Reg12H are fully accessible
in read-mode while Reg13H is accessible in limited write-mode (only 'customer_mode' and
'CE' bits can be written) and fully accessible in read-mode.
Customer mode
The STBC21 enters customer mode when bit7, in Reg13H, is set to '1'. In this mode the
configuration of the internal system registers is:
● Reg00H to Reg07H are accessible in read/write mode;
● Reg10H has limited write access (NVM interface commands);
● Reg11H and Reg12H are accessible only in read mode;
● Reg13H has limited write access (commands bits only);
● Reg14H is accessible only in read mode.
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