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Section 12 Bus State Controller (BSC)
Rev. 4.00 Sep. 14, 2005 Page 278 of 982
REJ09B0023-0400
•
Refresh timer control/status register (RTCSR)
•
Refresh timer counter (RTCNT)
•
Refresh time constant register (RTCOR)
•
Reset wait counter (RWTCNT)
12.4.1
Common Control Register (CMNCR)
CMNCR is a 32-bit register that controls the common items for each area. This register is only
initialized by a power-on reset, and it is not initialized by a manual reset and in the standby mode.
Do not access external memory other than area 0 until the CMNCR register initialization is
complete.
Bit Bit
Name
Initial
Value R/W Description
31 to 16
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
15
WAITSEL
0
R/W
WAIT Signal Sampling Timing Specification
Specifies the external WAIT signal sampling timing.
0: Samples the WAIT signal at the falling edge of the
CKIO. In this case, the WAIT signal can be input
asynchronously.
1: Samples the WAIT signal at the rising edge of the
CKIO. In this case, the WAIT signal must be input
synchronously.
14, 13
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
12 MAP 0 R/W
Space
Specification
Selects the address map for the external address
space. The address maps to be selected are shown in
tables 12.2 and 12.3.
0: Selects address map 1.
1: Selects address map 2.
Summary of Contents for HD6417641
Page 2: ...Rev 4 00 Sep 14 2005 Page ii of l...
Page 7: ...Rev 4 00 Sep 14 2005 Page vii of l...
Page 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
Page 12: ...Rev 4 00 Sep 14 2005 Page xii of l...
Page 28: ...Rev 4 00 Sep 14 2005 Page xxviii of l...
Page 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Page 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Page 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Page 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Page 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Page 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Page 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Page 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Page 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Page 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Page 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Page 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Page 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Page 1032: ...Rev 4 00 Sep 14 2005 Page 982 of 982 REJ09B0023 0400 X X Y data addressing 52 X Y memory 193...
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