TC9WMB1AFK/FU,TC9WMB2AFK/FU

2007-10-19

10

device enters the standby state.

modes.

)

and the device is ready to accept the next instruction.

(6)

Software reset

The device cannot be reset externally because it does not incorporate a RESET pin. Instead, the

device is reset by software. The software resets the device to the same state using the power-on clear

circuit. The address counter returns to the first address 00H and the SDA pin goes to the

high-impedance state (standby state).

The software reset is invoked when a start condition is generated followed by nine SCL clock pulses

(dummy cycles). While a dummy cycle is inserted, the SDA line must be pulled high. This reset

operation stops an acknowledge output and data transfer. The reset is completed by generating

another start condition. Issue a stop condition before starting a new transfer.

Start conditions of five times or more cannot be generated from stop condition to the next stop

condition.

Incremented.

Start

Device address

R/W

ACK

Data

NACK Stop

Read instruction

Address counter is not incremented during this period.

SCL

SDA

1

28

9

Stop condition

Start condition

Dummy cycles

Start condition

Figure 13 Software reset