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Section 6 Bus Controller (BSC)
Rev.2.00 Jun. 28, 2007 Page 158 of 666
REJ09B0311-0200
(d)
Address/data multiplexed I/O interface
The number of access cycles in data cycle of the address/data multiplexed I/O interface is the
same as that in the basic bus interface. The number of access cycles in address cycle can be
specified as two or three cycles by the ADDEX bit in MPXCR.
Number of access cycles in the address/data multiplexed I/O interface
= number of address output cycles (2, 3) + number of data output cycles (2, 3)
+ number of program wait cycles (0 to 7)
+ number of
CS
extension cycles (0, 1, 2)
[+number of external wait cycles by the
WAIT
pin]
Table 6.6 lists the number of access cycles for each interface.
Table 6.6
Number of Access Cycles
=
=
=
=
=
=
= Tma
[2,3]
= Tma
[2,3]
Th
[0,1]
Th
[0,1]
Th
[0,1]
Th
[0,1]
Th
[0,1]
Th
[0,1]
+Th
[0,1]
+Th
[0,1]
+T1
[1]
+T1
[1]
+T1
[1]
+T1
[1]
+T1
[1]
+T1
[1]
+T1
[1]
+T1
[1]
+T2
[1]
+T2
[1]
+T2
[1]
+T2
[1]
+T2
[1]
+T2
[1]
+T2
[1]
+T2
[1]
+Tt
[0,1]
+Tt
[0,1]
+Tt
[0,1]
+Tt
[0,1]
+Tt
[0,1]
+Tt
[0,1]
[2 to 4]
[3 to 12 + n]
[2 to 4]
[3 to 12 + n]
[(2 to 3) + (1 to 8)
×
m]
[(3 to 11 + n) + (1 to 8)
×
m]
[4 to 7]
[5 to 15 + n]
+Tpw
[0 to 7]
+Tpw
[0 to 7]
+Tpw
[0 to 7]
+Tpw
[0 to 7]
+TtW
[n]
+TtW
[n]
+TtW
[n]
+TtW
[n]
+T3
[1]
+T3
[1]
+T3
[1]
+T3
[1]
Basic bus interface
Byte control SRAM interface
Burst ROM interface
Address/data multiplexed I/O
interface
+Tb
[(1 to 8)
×
m]
+Tb
[(1 to 8)
×
m]
[Legend]
Numbers: Number of access cycles
n:
Pin wait (0 to
∞
)
m:
Number of burst accesses (0 to 63)
(e)
Strobe Assert/Negate Timings
The assert and negate timings of the strobe signals can be modified as well as number of access
cycles.
•
Read strobe (
RD
) in the basic bus interface
•
Chip select assertion period extension cycles in the basic bus interface
Содержание H8SX/1650
Страница 2: ...Rev 2 00 Jun 28 2007 Page ii of xxii...
Страница 106: ...Section 4 Exception Handling Rev 2 00 Jun 28 2007 Page 84 of 666 REJ09B0311 0200...
Страница 142: ...Section 5 Interrupt Controller Rev 2 00 Jun 28 2007 Page 120 of 666 REJ09B0311 0200...
Страница 326: ...Section 8 I O Ports Rev 2 00 Jun 28 2007 Page 304 of 666 REJ09B0311 0200...
Страница 470: ...Section 12 Watchdog Timer WDT Rev 2 00 Jun 28 2007 Page 448 of 666 REJ09B0311 0200...
Страница 546: ...Section 13 Serial Communication Interface SCI Rev 2 00 Jun 28 2007 Page 524 of 666 REJ09B0311 0200...
Страница 566: ...Section 14 A D Converter Rev 2 00 Jun 28 2007 Page 544 of 666 REJ09B0311 0200...
Страница 574: ...Section 16 RAM Rev 2 00 Jun 28 2007 Page 552 of 666 REJ09B0311 0200...
Страница 584: ...Section 17 Clock Pulse Generator Rev 2 00 Jun 28 2007 Page 562 of 666 REJ09B0311 0200...
Страница 638: ...Section 19 List of Registers Rev 2 00 Jun 28 2007 Page 616 of 666 REJ09B0311 0200...
Страница 668: ...Section 20 Electrical Characteristics Rev 2 00 Jun 28 2007 Page 646 of 666 REJ09B0311 0200...
Страница 676: ...Appendix Rev 2 00 Jun 28 2007 Page 654 of 666 REJ09B0311 0200...
Страница 688: ...Rev 2 00 Jun 28 2007 Page 666 of 666 REJ09B0311 0200...
Страница 691: ......
Страница 692: ...H8SX 1650 Group Hardware Manual...