z85c30 ZiLOG Semiconductor, z85c30 Datasheet - Page 9

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

PS011705-0608
Databus
Control
Channel A
Exploded View
Interrupt
Control
Bus Interface
CPU & DMA
INTACK
IEO
INT
IEI
Phase-Locked
FIFO 3 Byte
SDLC Frame Status FIFO
Rec. Status
Receive and Transmit Clock Multiplexer
Figure 1. SCC Block Diagram
Digital
Loop
Transmit
Buffer
10 X 19
Modem/Control Logic
Interrupt
Interrupt
Control
Control
FIFO 3 Byte
Logic
Logic
Rec. Status
Receive Logic
Transmit Logic
Baud Rate
Generator
CMOS SCC Serial Communications Controller
Data Encoding & CRC
Transmit MUX
Data Decode &
Sync Character
Channel A
Channel B
Receive MUX
CRC Checker
Register
Register
Generation
Detection
Oscillator
Amplifier
Crystal
Channel A
Channel B
TxDA
TRxCA
RTxCA
CTSA
DCDA
SYNCA
RTSA
DTRA/REQA
RxDA
Product Specification
General Description
5