z80c30 ZiLOG Semiconductor, z80c30 Datasheet - Page 27

• Manufacturer Part Number: z80c30
• Description: Cmos Scc Serial Communications Controller
• Manufacturer: ZiLOG Semiconductor

BRG
Input
RXD
DPLL
Upper Byte (WR13)
Time Constant
IN
16-Bit Down Counter
1-Bit
DPLL
Internal TXD
Lower Byte (WR12)
MUX
Time Constant
DPLL
OUT
NRZI Decode
DIV 2
To Transmit Section
Internal Data Bus
SYNC Register
& Zero Delete
Output
BRG
MUX
10 X 19 Frame
14-Bit Counter
Hunt Mode (BISYNC)
Status FIFO
SDLC-CRC
3-Bit
Rec. Error FIFO
I/O Data buffer
Register (8 bits)
3 Byte Deep
Receive Shift
CRC Delay
Register
CPU/I/O
Checker
CRC
CRC Result
SYNC
CRC
Rec. Error FIFO
Rec. Error Logic
3 Byte Deep