UPD6708 datasheet(42/72 Pages) NEC

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µPD6708

Table 6-7. Minimum Generation Intervals for Return Codes in Master Reception (

µs)

Time

Mode 0

Mode 1

Mode 2

Note

Approx. 8030

Approx. 5800

Approx. 1580

Approx. 400

Approx. 290

Approx. 10

Approx. 7290

Approx. 2050

Approx. 1550

Note

The mode 0 master receive data consists of up to 19 bytes. There-

fore, the receive buffer (20 bytes) does not become full, and a return

code is not generated.

(4)

Slave reception

The order of generation of slave reception return codes is as shown in Figure 6-4.

Figure 6-4. Return Code Generation Order in Slave Reception

The minimum generation intervals for return codes in master transmission are shown below.

Table 6-8. Minimum Generation Intervals for Return Codes in Slave Reception (

µs)

Note

The mode 0 master receive data consists of up to 19 bytes. There-

fore, the receive buffer (20 bytes) does not become full, and a return

code is not generated.

(5)

Broadcast reception

The return code generation order and minimum generation intervals in the case of broadcast reception are the same

as for (4) Slave reception as shown above.

Time

Mode 0

Mode 1

Mode 2

Note

Approx. 8030

Approx. 5800

Approx. 1580

Approx. 400

Approx. 290

Approx. 10

Approx. 7290

Approx. 2050

Approx. 1550

Slave Reception

Start

(Return Code

: 1000)

Slave Receive

Buffer Full

(Return Code : 1001)

New communication

return codes

• Slave reception start

(Return code : 1000)

• Broadcast reception

start

(Return code : 1100)

etc.

Slave Reception

Normal Termination

(Return Code : 1010)

Termination During

Slave Reception

(Return Code : 1011)

Slave Receive

Buffer Full

(Return Code : 1001)

Slave Reception

Normal Termination

(Return Code : 1010)

Termination During

Slave Reception

(Return Code : 1011)

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