Philips SC28L91 Product Data Sheet page 33

Philips Semiconductors
3.3 V or 5.0 V Universal Asynchronous
Receiver/Transmitter (UART)
RESETN
A0–A3
CEN
RDN
D0–D7
(READ)
WDN
D0–D7
(WRITE)
NOTE:
Bus action in the 80XXX mode terminates on the rise of CEN, WRN, or RDN which ever one occurs first.
2004 Oct 21
t
RES
80XXX Mode
Figure 4. Reset Timing
t
AS
t
AH
t
CS
t
RW
t
DD
NOT
FLOAT
VALID
t
DS
VALID
Figure 5. Bus Timing (80XXX mode)
RESETN
68XXX Mode
t
CH
t
RWD
t
DF
VALID FLOAT
t
RWD
t
DH
33
Product data sheet
SC28L91
t
RES
SD00696
SD00087