Z80230 View Datasheet(PDF) - Zilog

Part Name

Description

MFG CO.

Z80230

Zilog SCC Serial Communication Controller

Zilog 

Application Note

Boost Your System Performance Using The Zilog ESCC™

AUTOMATIC OPENING FLAG TRANSMISSION (Continued)

End of Frame Flag

Data EOF Data

Data with Special Condition

Data Data* Data

Rx

Data

FIFO

Data

EOF

Data

Packet N

Packet N+1

Receive Character

Available Interrupt

Rx

Data

FIFO

Data*

Data

Special Condition

Interrupt

1. Enable Receive Interrupt on Special Conditions only.

1. Enable Receive Interrupt on Special Conditions only.

2. Receive Data FIFO not locked.

2. Receive Data FIFO locked.

3. Special Condition Interrupt generated.

3. Receive Character Available Interrupt generated

even if it has not been enabled to indicate detection of EOF.

Figure 10. SDLC Status FIFO Anti-Lock

SDLC FIFO Ena

Receive Interr

Special Conditi

6-126

CRC err

Overrr

Error

Pari

Erro

Specia

Conditi

Interru

Data

FIFO

Locke

Erro

Rese

Data

FIFO

Unloc

End o

Frame

Receive Char

Available In

"Reset Hig

IUS" to R

EOF Inter

Figure 11. Receive Interrupt Mechanism 1

UM010901-0601

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