Fujitsu MPB3052AT User Manual download pdf (Page 157)

C141-E045-02EN6 - 2

6.1.1 Response to power-on

After the master device (device 0) releases its own power-on reset state, the master device

shall check a DASP- signal for up to 450 ms to confirm presence of a slave device (device 1).

The master device recognizes presence of the slave device when it confirms assertion of the

DASP- signal. Then, the master device checks a PDIAG- signal to see if the slave device has

successfully completed the power-on diagnostics.

If the master device cannot confirm assertion of the DASP- signal within 450 ms, the master

device recognizes that no slave device is connected.

After the slave device (device 1) releases its own power-on reset state, the slave device shall

report its presence and the result of power-on diagnostics to the master device as described

below:

DASP- signal: Asserted within 400 ms.

PDIAG- signal: Negated within 1 ms and asserted within 30 seconds.

Max. 400 ms.

Max. 30 sec.

Max. 1 ms.

If presence of a slave device is

confirmed, PDIAG- is checked for

up to 31 seconds.

Checks DASP- for up to

450 ms.

Max. 31 sec.

DASP-

PDIAG-

BSY bit

Power On Reset-

Status Reg.

BSY bit

Power On Reset-

Slave device

Master device

Power on

Figure 6.1 Response to power-on

1 2 ... 152 153 154 155 156 157 158 159 160 161 162 ... 179 180

No comments

Fujitsu MPB3052AT User Manual Page 157