Section 6 Bus Controller (BSC)
Rev.2.00 Jun. 28, 2007 Page 150 of 666
REJ09B0311-0200
6.5 External
Bus
6.5.1 Input/Output
Pins
Table 6.2 shows the pin configuration of the bus controller and table 6.3 shows the pin functions
on each interface.
Table 6.2
Pin Configuration
Name Symbol
I/O
Function
Bus cycle start
BS
Output
Signal
indicating that the bus cycle has
started
Address strobe/address hold
AS
/
AH
Output
•
Strobe signal indicating that the basic
bus, byte control SRAM, or burst ROM
space is accessed and address output
on address bus is enabled
•
Signal to hold the address during
access to the address/data multiplexed
I/O interface
Read strobe
RD
Output
Strobe signal indicating that the basic bus,
byte control SRAM, burst ROM, or
address/data multiplexed I/O space is
being read
Read/write RD/
WR
Output
•
Signal indicating the input or output
direction
•
Write enable signal of the SRAM during
access to the byte control SRAM space
Low-high write/lower-upper
byte select
LHWR
/
LUB
Output
•
Strobe signal indicating that the basic
bus, burst ROM, or address/data
multiplexed I/O space is written to, and
the upper byte (D15 to D8) of data bus
is enabled
•
Strobe signal indicating that the byte
control SRAM space is accessed, and
the upper byte (D15 to D8) of data bus
is enabled
Содержание H8SX/1650
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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...
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