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Philips Semiconductors Product data sheet
SCC2691Universal asynchronous receiver/transmitter (UART)
2006 Aug 04
3
ORDERING INFORMATION
COMMERCIAL INDUSTRIAL
PACKAGES
V
CC
= +5V +10%,
T
A
= 0°C to +70°C
V
CC
= +5V +10%,
T
A
= –40°C to +85°C
VERSION
24-Pin Plastic Dual In-Line Package (DIP) SCC2691AC1N24 SCC2691AE1N24 SOT222–1
28-Pin Plastic Leaded Chip Carrier (PLCC) Package SCC2691AC1A28 SCC2691AE1A28 SOT261-2
24-Pin Plastic Small Outline Large (SOL) Package SCC2691AC1D24 SOT137-1
BLOCK DIAGRAM
8
D0–D7
RDN
WRN
CEN
A0–A2
RESET
INTRN
X1/CLK
X2
TIMING
CONTROL
INTERNAL DATA
BUS
3
BUS BUFFER
OPERATION CONTROL
ADDRESS
DECODE
R/W CONTROL
INTERRUPT CONTROL
IMR
ISR
TIMING
BAUD RATE
GENERATOR
CLOCK
SELECTORS
COUNTER/
TIMER
CRYSTAL
OSCILLATOR
POWER DOWN
LOGIC
CSR
ACR
CTUR
CTLR
CHANNEL A
TRANSMIT
HOLDING REG
TRANSMIT
SHIFT REGISTER
RECEIVE
HOLDING REG (3)
RECEIVE
SHIFT REGISTER
MR1, 2
CR
SR
INPUT PIN
CHANGE OF
STATE
DETECTOR
OUTPUT PIN
FUNCTION
SELECT LOGIC
ACR
TxD
RxD
MPI
MPO
V
CC
GND
SD00123
Figure 2. Block Diagram