UPD77533 datasheet(49/104 Pages) RENESAS

номер детали	UPD77533

подробное описание детали	MOS INTEGRATED CIRCUIT

PDF	104 Pages

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производитель	RENESAS [Renesas Technology Corp]

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Data Sheet S15671EJ4V0DS

µµµµPD77533

14.1.3 Server commands

When sending server commands to the

µPD77533, do not send the next command until a command response is

returned.

Multiple commands may be sent consecutively from the LS, but in this case, pool the commands from the LS on

the host CPU side and make sure that only one command is sent to the

µPD77533 at a time.

For command response, because packet transmission/reception can be managed via ACK and NACK, there is no

problem as long as the packet from the

µPD77533 is received without delay in the one-packet buffer provided on the

host CPU side.

Figure 14-3. Server Command Flow (with No Hardware Flow Control)

PD77533

Host CPU

Response

The PD77533 sends the next

packet after receiving ACK.

Before this, a response is sent to the LS.

Command

ACK

Response

Command

Response 1

Command 1

ACK

Response 2

Command 2

ACK

Command 1

Command 2

Response 2

Response 1

If command 2 is sent before a response

to command 1 is returned, command 2 is

held pending.

The next command can be sent now.

UPD77533 датащи(PDF) 49 Page - Renesas Technology Corp