FOR AUTOMOTIVE BATTERY PROTECTION IC FOR 3-SERIAL TO 5-SERIAL CELL PACK (SECONDARY PROTECTION)

S-8235A Series

Seiko Instruments Inc.

11

3. Overcharge timer reset function

The S-8235A Series has an overcharge timer reset function.

Battery voltage

CO pin

shorter

shorter

Timer reset

longer

(n = 1 to 5)

shorter

Figure 6 Overcharge Timer Reset Operation

4. Status of pins

The status of pins for the S-8235A Series is shown in Table 6.

When inputting "H" to the CTL pin, the CO pin outputs "H" in 1.0 ms typ. at normal status, and maintains "H" at

overcharge status. Each of the RSTO pin, the CLKO pin, and the CAO pin outputs a signal in 1.0 ms typ. from inputting.

When performing a self-test operation, input "L" to the RSTI pin. Refer to " Self-test Function" for the self-test

operation.

Table 6

I/O

Symbol

Normal Operation

Self-test Operation

Input

RSTI

"H"

"L"

CTL

"H"

"L"

"H"

"L"

CLKI

"H"

"L"

"H"

"L"

"H"

"L"

"H"

"L"

CAI

"H"

"L"

"H"

"L"

"H"

"L"

"H"

"L"

"H"

"L"

"H"

"L"

"H"

"L"

"H"

"L"

Output

CO

"H"

"L" (Normal status) /

"H" (Overcharge status)

"H"

"L" (Normal status) /

"H" (Overcharge status)

RSTO

"H"

Refer to "2. RSTO pin" in " Self-test Function"

CLKO

"H"

Refer to "3. CLKO pin"in" Self-test Function"

CAO

"L"

Refer to "4. CAO pin" in " Self-test Function"