SCN68681E1F40 PHILIPS [NXP Semiconductors], SCN68681E1F40 Datasheet - Page 19

• Manufacturer Part Number: SCN68681E1F40
• Description: Dual asynchronous receiver/transmitter DUART
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
1998 Sep 04
Dual asynchronous receiver/transmitter (DUART)
DACKN requires two rising edges of X1 clock after CEN is low.
NOTE:
RESETN
Figure 3. Reset Timing
DTACKN
X1/CLK
DTACKN
A1–A4
D0–D7
X1/CLK
A1–A4
D0–D7
RWN
CSN
t
RWN
RES
CSN
SD00109
t
AS
t
AS
Figure 4. Bus Timing (Read Cycle)
Figure 5. Bus Timing (Write Cycle)
t
AH
t
RWS
t
t
t
AH
CSC
RWS
t
t
t
DD
DS
CSC
t
DAL
t
DCW
t
DCR
19
t
CSD
t
CSD
t
DAT
t
DAT
t
CSW
t
CSW
t
t
t
t
RWH
t
DAH
t
RWH
DF
DH
DAH
SD00110
SD00111
SCN68681
Product specification