Z80182 Zilog., Z80182 Datasheet - Page 20

• Manufacturer Part Number: Z80182
• Description: Z8018x Family MPU
• Manufacturer: Zilog.

Zilog
Z85230 ESCC
For a detailed description of the Z85230 ESCC, refer to the ESCC Technical Manual. The following figure is the block
diagram of the discrete ESCC, which was integrated into the Z182. The /INT line is internally connected to "INTO of the
Z182.
3-20
Databus
Control
Channel A
™
Exploded View
BLOCK DIAGRAM
Interrupt
Control
Bus Interface
CPU & DMA
/INTACK
/INT
IEO
IEI
* 8 bytes each
Rec. Status*
SDLC Frame Status FIFO
Phase-Locked
FIFO
Transmit FIFO
Digital
Receive and Transmit Clock Multipexer
Loop
Figure 5. ESCC Block Diagram
4 Bytes
P R E L I M I N A R Y
10 x 19
Modem/Control Logic
Interrupt
Internal
Control
Control
Logic
Logic
Rec. Data*
Receive Logic
Transmit Logic
FIFO
Baud Rate
Generator
Data Encoding & CRC
Transmit MUX
Channel A
Channel B
Generation
Sync Character
Data Decode &
Register
Register
Receive MUX
CRC Checker,
Detection
Oscillator
Amplifier
Crystal
Channel A
Channel B
TxDA
/TRxCA
/RTxCA
/CTSA
/DCDA
/SYNCA
/RTSA
/DTRA//REQA
RxDA
Z
ILOG
I
NTELLIGENT
DS971820600
Z80182/Z8L182
P
ERIPHERAL