SMB239

Summit Microelectronics, Inc

2129 3.0 2/23/2009

21

CONFIDENTIAL

DO NOT COPY

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 below

Table 4 – Charge current – 8-bit (address: 00h) – Non-Volatile & Volatile (mirror)

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Fast Charge Current

0

0

0

0

X

X

X

X

47.5mA

0

0

0

1

X

X

X

X

62.5mA

0

0

1

0

X

X

X

X

65.0mA

0

0

1

1

X

X

X

X

67.5mA

0

1

0

0

X

X

X

X

195mA

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

0

0

X

X

X

X

435mA

1

1

0

1

X

X

X

X

465mA

1

1

1

0

X

X

X

X

495mA

1

1

1

1

X

X

X

X

525mA

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Pre-charge current

X

X

X

X

0

0

0

0

25mA

X

X

X

X

0

0

0

1

37.5mA

X

X

X

X

0

0

1

0

50mA

X

X

X

X

0

0

1

1

62.5mA

X

X

X

X

0

1

0

0

75mA

X

X

X

X

0

1

0

1

87.5mA

X

X

X

X

0

1

1

0

100mA

X

X

X

X

0

1

1

1

112.5mA

X

X

X

X

1

0

0

0

125mA

X

X

X

X

1

0

0

1

137.5mA

X

X

X

X

1

0

1

0

150mA

X

X

X

X

1

0

1

1

162.5mA

X

X

X

X

1

1

0

0

175mA

X

X

X

X

1

1

0

1

187.5mA

X

X

X

X

1

1

1

0

200mA

X

X

X

X

1

1

1

1

212.5mA

Note 4: Never Write to Reserved bits.

Note 5: Charge current can be limited by internal current limit under certain conditions.

CONFIGURATION REGISTERS