IMP16C552-CJ68 IMP Inc, IMP16C552-CJ68 Datasheet - Page 31

• Manufacturer Part Number: IMP16C552-CJ68
• Description: Dual Universal Asynchronous Receiver/Transmitter (UART) with 16-BYTE FIFO & Parallel Printer Port
• Manufacturer: IMP Inc

31
(1)See Write Cycle Timing
(2)See Read Cycle Timing
Symbol
tHR
tIR
tIRS
tSI
tSTI
tSXA
tWXI
NOTES:
THRE INTERRUPT
SERIAL OUT
IOR*(2)
(write THR)
IOW*(1)
(SOUT)
(read IIR)
Parameter
Delay from IOW* (WR THR)
to Reset Interrupt
Delay from IOR* (RD IIR) to Reset
Interrupt(THRE)
Delay from Initial INTRPT reset to
transmit Start
Delay from Initial Write to Interrupt
Delay from Stop to Interrupt(THRE)
Delay from Start to TXREY Active
Delay from Write to TXRDY Inactive
tIRS
tHR
FIGURE 14 – Transmitter Timing
START
408-432-9100/www.impweb.com
tSI
DATA(5-8)
Min
0
16
8
0
0
tHR
PARITY
Max
50
250
12
32
8
8
60
STOP
IMP16C552
IMP16C552
Units
nsec
nsec
BAUDOUT
Cycles
BAUDOUT
Cycles
BAUDOUT
Cycles
(note 1)
BAUDOUT
Cycles
nsec
tSTI
START
tIR
Test Conditions
100pF Load
100pF Load
(note 1)
(note 1)
100pF Load
100pF Load
© 2002 IMP, Inc.