Section 6
Bus Controller (BSC)
Rev.2.00 Jun. 28, 2007 Page 183 of 666
REJ09B0311-0200
6.7.5 Wait
Control
The bus cycle can be extended for the byte control SRAM interface by inserting wait cycles (Tw)
in the same way as the basic bus interface.
(1)
Program Wait Insertion
From 0 to 7 wait cycles can be inserted automatically between T2 cycle and T3 cycle for the 3-
state access space in area units, according to the settings in WTCRA and WTCRB.
(2)
Pin Wait Insertion
For 3-state access space, when the WAITE bit in BCR1 is set to 1, the corresponding DDR bit is
cleared to 0, and the ICR bit is set to 1, wait input by means of the
WAIT
pin is enabled. For
details on DDR and ICR, see section 8, I/O ports.
Figure 6.25 shows an example of wait cycle insertion timing.
Содержание H8SX/1650
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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...
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Страница 668: ...Section 20 Electrical Characteristics Rev 2 00 Jun 28 2007 Page 646 of 666 REJ09B0311 0200...
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