CD1865 Datasheet, PDF (22/150 Pages) Intel Corporation – Intelligent Eight-Channel Communications Controller

CD1865 — Intelligent Eight-Channel Communications Controller
Figure 2. Internal Block Diagram
RREQ*
TREQ*
MREQ*
ACKOUT*
ACKIN*
RECEIVE
SERVICE
REQUEST
QUEUE
SERVICE TRANSMIT
REQUEST SERVICE
LOGIC REQUEST
QUEUE
ROM
ADR[0–6]
DATA[1–7]
CS*
DS*
R/W
DTACK*
INTEL/MOT*
RESET*
CLK
DBLCLK
NO_OSC
OSC1
OSC2
MODEM
SERVICE
REQUEST
QUEUE
CPU
INTERRUPT
HANDLER
BUS
INTERFACE
RAM
PER
CHANNEL
TIMER
I/O PINS
(MODEM
CONTROL)
RTS*
CTS*
DTR*
DSR*
CD*
5 LINES
5 LINES
5 LINES
5 LINES
5 LINES
5 LINES
5 LINES
RECEIVE BIT
ENGINE
TRANSMIT BIT
ENGINE
DUAL-BAUD RATE
GENERATORS
RXDATA
TXDATA
RECEIVE BIT
ENGINE
TRANSMIT BIT
ENGINE
DUAL-BAUD RATE
GENERATORS
RXDATA
TXDATA
RECEIVE BIT
ENGINE
TRANSMIT BIT
ENGINE
DUAL-BAUD RATE
GENERATORS
RXDATA
TXDATA
RECEIVE BIT
ENGINE
TRANSMIT BIT
ENGINE
DUAL-BAUD RATE
GENERATORS
RXDATA
TXDATA
RECEIVE BIT
ENGINE
TRANSMIT BIT
ENGINE
DUAL-BAUD RATE
GENERATORS
RECEIVE BIT
ENGINE
TRANSMIT BIT
ENGINE
DUAL-BAUD RATE
GENERATORS
RXDATA
TXDATA
RXDATA
TXDATA
RECEIVE BIT
ENGINE
TRANSMIT BIT
ENGINE
DUAL-BAUD RATE
GENERATORS
RXDATA
TXDATA
RECEIVE BIT
ENGINE
TRANSMIT BIT
ENGINE
DUAL-BAUD RATE
GENERATORS
RXDATA
TXDATA
22
Datasheet