Section 7 Bus State Controller (BSC)
Rev. 2.00 Mar 09, 2006 page 293 of 906
REJ09B0292-0200
Bytes are specified using DQMUU, DQMUL, DQMLU, and DQMLL. The read/write is
performed on the byte whose DQM is low. For 32-bit data, DQMUU specifies 4n address access
and DQMLL specifies 4n + 3 address access. For 16-bit data, only DQMLU and DQMLL are
used. Figure 7.20 shows an example in which a 32-bit connection uses a 256 k
×
16 bit
synchronous DRAM. Figure 7.21 shows an example with a 16-bit connection.
A11
A2
CKIO
CKE
CSn
RAS
CAS
/
OE
RD/
WR
D31
D16
DQMUU/
WE3
DQMUL/
WE2
D15
D0
DQMLU/
WE1
DQMLL/
WE0
A9
A0
CLK
CKE
CS
RAS
CAS
WE
I/O15
I/O0
DQMU
DQML
Chip
256 k
×
16-bit
synchronous
DRAM
…
…
…
…
…
…
…
…
A9
A0
CLK
CKE
CS
RAS
CAS
WE
I/O15
I/O0
DQMU
DQML
…
…
…
…
…
…
Figure 7.20 Synchronous DRAM 32-bit Device Connection
Содержание SH7616
Страница 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
Страница 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Страница 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Страница 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...