SC28L202 Philips Semiconductors, SC28L202 Datasheet - Page 68

• Manufacturer Part Number: SC28L202
• Description: Dual universal asynchronous receiver/transmitter DUART
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2000 Feb 10
Dual UART
NOTE: DACKN low requires two rising edges of X1 clock after CSN is low.
NOTE: DACKN low requires two rising edges of X1 clock after CSN is low.
DTACKN
X1/CLK
DTACKN
D0–D7
A1–A4
X1/CLK
D0–D7
RWN
A1–A4
CSN
RWN
CSN
t
DA
Figure 5. Bus Timing (Write Cycle) (68XXX mode)
Figure 4. Bus Timing (Read Cycle) (68XXX mode)
t
t
AS
AS
t
CS
t
VALID
CS
t
t
NOT
CSC
DD
t
t
DS
CSC
t
AH
t
AH
t
DCW
t
DCR
62
DATA VALID
t
DAT
t
DAT
t
RWD
t
RWD
t
t
t
CH
t
CH
t
DAH
t
DF
DH
DAH
SD00687
SD00688
Objective specification
SC28L202