SCN2681T View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
SCN2681T Datasheet PDF : 14 Pages
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Philips Semiconductors
Dual asynchronous receiver/transmitter (DUART)
Product specification
SCN2681T
BLOCK DIAGRAM
8
D0–D7
BUS BUFFER
RDN
WRN
CEN
4
A0–A3
RESET
OPERATION CONTROL
ADDRESS
DECODE
R/W CONTROL
INTRN
INTERRUPT CONTROL
IMR
ISR
X1/CLK
X2
TIMING
BAUD RATE
GENERATOR
CLOCK
SELECTORS
COUNTER/
TIMER
XTAL OSC
CSRA
CSRB
ACR
CTLUR
CTLR
CHANNEL A
TRANSMIT
HOLDING REG
TRANSMIT
SHIFT REGISTER
RECEIVE
HOLDING REG (3)
RECEIVE
SHIFT REGISTER
MRA1, 2
CRA
SRA
CHANNEL B
(AS ABOVE)
INPUT PORT
CHANGE OF
STATE
DETECTORS (4)
IPCR
ACR
OUTPUT PORT
FUNCTION
SELECT LOGIC
OPCR
OPR
Figure 2. Block Diagram
TxDA
RxDA
TxDB
RxDB
7
IP0-IP6
8
OP0-OP7
VCC
GND
SD00099
1998 Sep 04
4
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