z85c30 ZiLOG Semiconductor, z85c30 Datasheet - Page 17

• Manufacturer Part Number: z85c30
• Description: Cmos Scc Serial Communications Controller
• Manufacturer: ZiLOG Semiconductor

Functional Description
PS011705-0608
The architecture of the SCC is described below:
The SCC’s peripheral and data communication are described in the following sections.
Figure 1
Figure 6
transmit logic to the system bus. The features and data path for each of the SCC’s A and B
channels are identical.
•
•
From Receiver
SYNC
As a data communications device which transmits and receives data in various
protocols.
As a microprocessor peripheral in which the SCC offers valuable features
such as vectored interrupts and DMA support.
Zero Insert
CRC-Gen
(5 Bits)
WR7
on page 5 displays the SCC block diagram.
and
Register SYNC
Figure 7
20-Bit TX Shift Register
Figure 6. SCC Transmit Data Path
Internal Data Bus
SDLC
WR6
display the details of the communications between the receive and
Sync
Sync
Register
MUX & 2-Bit
Transmit
WRB
Delay
CMOS SCC Serial Communications Controller
Transmit Clock
TX Buffer
1 Byte
Internal TXD
Encode
Final TX
NRZ
MUX
To Other Channel
Product Specification
TXD
Functional Description
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