z85230 ZiLOG Semiconductor, z85230 Datasheet - Page 13

• Manufacturer Part Number: z85230
• Description: Enhanced Serial Communications Controller
• Manufacturer: ZiLOG Semiconductor

Functional Description
PS005303-0907
The architecture of the ESCC is described based on its functionality as a:
•
•
The details of the communication between the receive and transmit logic of the system bus
are illustrated in
the ESCC A and B channels are identical. For more information on SCC/ESCC and ISCC
Family of Products, refer to the respective User Manuals available for download from
www.zilog.com.
From Receiver
Data communications device which transmits and receives data in a wide variety of
protocols
Microprocessor peripheral in which the ESCC offers valuable features such as
vectored interrupts and DMA support
SYNC Register
Zero Insert
CRC-SDLC
20-Bit TX
CRC-Gen
WR7
Figure 5
Figure 5. ESCC Transmit Data Path
Internal Data Bus
SYNC Register
Shift Register
WR6
and
SYNC
SDLC
ASYNC
Figure 6
2 Bit Delay
MUX and
Transmit
WR8
on page 9. The features and data path for each of
Transmit Clock
TX FIFO
4 Bytes
NRZI Encode
Internal TXD
Final Tx
MUX
Product Specification
to Other Channel
Functional Description
Z85230/Z80230
TXD
8