FOR AUTOMOTIVE 125°C OPERATION 2-WIRE CONVENIENCE TIMER

S-35710 Series

Seiko Instruments Inc.

13

Figure 16 and Figure 17 show the status transition diagram about the one-shot loop time-out operation.

Count up every

second

Timing status

INT pin = "H"

Timing stop status

INT pin = "H"

Timing status

INT pin = "H"

Initial status

Wake-up time register = "0 h"

Timer = "0 h"

INT pin = "H"

Timer reset

Timer = "0 h"

INT pin = "H"

Remark Write: Wake-up time register write command

Read: Time register read command

Read mode

Write mode

Write

Write

Write

Read

Read

Read

Power-on

RST pin = "L"

RST pin = "H"

Count up every

second

RST pin = "L"

RST pin = "L"

RST pin = "L"

Write

Read

RST pin = "L"

Timer = "FFFFFF h"

Timer

= Wake-up time register

Automatic

migration

Automatic

migration

Timing stop status

INT pin = "L" pulse

Figure 16 Status Transition Diagram of One-shot Loop Time-out (Nch Open-drain Output)

Count up every

second

Timing status

INT pin = "L"

Timing stop status

INT pin = "L"

Timing status

INT pin = "L"

Initial status

Wake-up time register = "0 h"

Timer = "0 h"

INT pin = "L"

Timer reset

Timer = "0 h"

INT pin = "L"

Remark Write: Wake-up time register write command

Read: Time register read command

Read mode

Write mode

Write

Write

Write

Read

Read

Read

Power-on

RST pin = "L"

RST pin = "H"

Count up every

second

RST pin = "L"

RST pin = "L"

RST pin = "L"

Write

Read

RST pin = "L"

Timer = "FFFFFF h"

Timer

= Wake-up time register

Automatic

migration

Automatic

migration

Timing stop status

INT pin = "H" pulse

Figure 17 Status Transition Diagram of One-shot Loop Time-out (CMOS Output)