SCN26562 データシートの表示（PDF） - Philips Electronics
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SCN26562 Datasheet PDF : 17 Pages
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Philips Semiconductors
Dual universal serial communications controller (DUSCC)
Product specification
SCN26562
AC ELECTRICAL CHARACTERISTICS (Continued)
A6–A1
CEN
RDN
D0–D7
RDYN
tADVRDL
tCELRDL
tRDLDDV
tRDLRYL
tRDHCEH
tCEHCEL
tRDLRDH
tRDLADI
tRYZDDV
1
tRDHRDL
tRDHDDF
tRDHDDI
NOTES:
1. Wait on Rx. Receiver FIFO empty.
2. 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.
Figure 4. Read Cycle
SD00206
SYMBOL
PARAMETER
tADVRDL
tCELRDL
tRDLADI
tRDLRYL
tRDLDDV
tRDLRDH
tRYZDDV
tRDHCEH
tCEHCEL
tRDHDDI
tRDHRDL
tRDHDDF
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
LIMITS
SCN26562C4
SCN26562C2
Min
Max
Min
Max
10
10
0
0
150
275
150
275
280
300
300
100
310
100
0
0
160
170
10
10
160
75
170
75
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1995 May 1
7
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