Z85233 Datasheet, PDF (46/317 Pages) Zilog, Inc. – The Zilog SCC Serial Communication Controller

SCC™/ESCC™ User’s Manual
Interfacing the SCC/ESCC
04
03
04
2
TxFIFO
02
03
04
01
02
03
Opening Flag Tx Shift Register
TBE=0
01
TBE=1
02
TBE=1
Figure 2-17. Transmit Buffer Empty Bit Status For ESCC For Both WR7' and WR7' D5=0
04
03
04
TxFIFO
02
03
01
02
Opening Flag Tx Shift Register
No Transmit Interrupt
TxIP = 0
01
Transmit Interrupt
TxIP = 1
Figure 2-18. Transmit Interrupt Status When WR7' D5=0 For ESCC
.
Data
TXBE
Data
CRC1
CRC2
TXIP Bit
TXIP 1
Figure 2-19. TxIP Latching on the ESCC
Flag
Time "A"
TXIP 2
UM010901-06
01
2-27