scn26562 NXP Semiconductors, scn26562 Datasheet - Page 7

• Manufacturer Part Number: scn26562
• Description: Dual Universal Serial Communications Controller Duscc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
AC ELECTRICAL CHARACTERISTICS (Continued)
1995 May 1
Dual universal serial communications controller (DUSCC)
SYMBOL
SYMBOL
t
t
t
t
t
t
t
t
t
t
t
t
ADVRDL
CELRDL
RDLADI
RDLRYL
RDLDDV
RDLRDH
RYZDDV
RDHCEH
CEHCEL
RDHDDI
RDHRDL
RDHDDF
A6–A1
D0–D7
1.
2.
RDYN
NOTES:
RDN
CEN
Wait on Rx. Receiver FIFO empty.
Timing is illustrated and referenced to the WRN and RDN inputs. The device may also be operated with CEN as the ‘strobing’ input. CEN and RDN
(also CEN and WRN) are ANDed internally. As a consequence, the signal asserted last initiates the cycle and the signal negated first terminates the
cycle.
Address valid to RDN low
CEN low to RDN low
RDN low to address invalid
RDN low to RDYN low
RDN low to read data valid
RDN low to RDN high
RDYN high impedance to read data valid
RDN high to CEN high
CEN high to CEN low
RDN high to read data invalid
RDN high to RDN low
RDN high to data bus floating
t
CELRDL
t
ADVRDL
PARAMETER
PARAMETER
t
t
RDLDDV
RDLRYL
Figure 4. Read Cycle
t
RDLRDH
1
7
t
RDLADI
t
RYZDDV
t
RDHCEH
Min
150
300
160
160
10
10
0
0
SCN26562C4
t
RDHDDI
Max
275
280
100
t
75
RDHDDF
t
LIMITS
RDHRDL
Min
150
310
170
170
10
10
0
0
t
SCN26562C2
CEHCEL
Max
SCN26562
275
300
100
75
Product specification
SD00206
UNIT
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns