SMB239
CONFIGURATION REGISTERS
The following tables describe the user-programmable registers of the SMB239 programmable battery charger.
Locations 00-0F are non-volatile, EEPROM registers; however, registers 00-07, which contain the battery charging
parameters, may also be configured to be programmable in RAM. Locations 31-3F contain volatile status and
command registers. To lock all of the configuration registers, set 0E[2]=1; please note that this operation cannot be
undone. To allow volatile access to locations 00-07, set 0E[0]=1; then after every power-on, 31[7] must also be set
high. It is prohibited to write to any location, not specifically mentioned in the tables below4.
Table 4 – Charge current – 8-bit (address: 00h) – Non-Volatile & Volatile (mirror)
Bit7
0
Bit6
0
Bit5
0
Bit4
0
Bit3
X
Bit2
X
Bit1
X
Bit0
X
Fast Charge Current
47.5mA
62.5mA
65.0mA
67.5mA
195mA
0
0
0
1
X
X
X
X
0
0
1
0
X
X
X
X
0
0
1
1
X
X
X
X
0
1
0
0
X
X
X
X
0
1
0
1
X
X
X
X
225mA
0
1
1
0
X
X
X
X
255mA
0
1
1
1
X
X
X
X
285mA
1
0
0
0
X
X
X
X
315mA
1
0
0
1
X
X
X
X
345mA
1
0
1
0
X
X
X
X
375mA
1
0
1
1
X
X
X
X
405mA
1
1
1
1
1
1
1
1
0
0
1
1
Bit5
0
1
0
1
Bit4
X
X
X
X
Bit3
X
X
X
X
Bit2
X
X
X
X
Bit1
X
X
X
X
Bit0
435mA
465mA
495mA
CONFIDENTIAL
525mA
Bit7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Bit6
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Pre-charge current
D
X
O
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
NO
0
T
0
C
0
OP
0
Y
25mA
37.5mA
50mA
62.5mA
75mA
87.5mA
100mA
112.5mA
125mA
137.5mA
150mA
162.5mA
175mA
187.5mA
200mA
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
212.5mA
Note 4: Never Write to Reserved bits.
Note 5: Charge current can be limited by internal current limit under certain conditions.
Summit Microelectronics, Inc
2129 3.0 2/23/2009
21
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
