Z80230 查看數據表（PDF） - Zilog

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Z80230

Zilog SCC Serial Communication Controller

Zilog 

SCC™/ESCC™ User’s Manual

Interfacing the SCC/ESCC

2.4 INTERFACE PROGRAMMING (Continued)

START

Write Last Data

TxIP=1 ?

No

(TBE=1)

Yes

Issue

Reset Tx IP command

No

Underrun/EOM

INT?

Yes

Issue Ext/Stat Int cmd

(to clear Ext/stat INT)

ESCC

Write data for next

packet (max. 4 Bytes)

ESCC or

NMOS/CMOS

NMOS/CMOS

TxIP=1 ?

No

(TBE=1)

Yes

Write 1st byte of

Next Packet (1 byte)

End

Figure 2-22. Flowchart example of processing an end of packet

2-30

UM010901-06

01

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