HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 321

• Manufacturer Part Number: HD6417641
• Manufacturer: RENESAS [Renesas Technology Corp]

BSC functional block diagram is shown in figure 12.1.
[Legend]
CMNCR:
CSnWCR:
RWTCNT:
CSnBCR:
SDCR:
RTCSR:
RTCNT:
RTCOR:
CS0, CS2, CS3,
CS4, CS5A, CS5B,
CS6A, CS6B
A25 to A0,
D31 to D0
BS, RD/WR,
RD, WE3 to WE0,
RASU, RASL,
CASU, CASL
CKE, DQMxx, AH,
FRAME
Common control register
CSn space wait control register (n = 0, 2, 3, 4, 5A, 5B, 6A, 6B)
Reset wait counter
CSn space bus control register (n = 0, 2, 3, 4, 5A, 5B, 6A, 6B)
SDRAM control register
Refresh timer control/status register
Refresh timer counter
Refresh time constant register
BACK
BREQ
WAIT
MD3
Figure 12.1 BSC Functional Block Diagram
mastership
controller
controller
controller
controller
controller
Refresh
Memory
Area
Wait
Bus
Comparator
CS0WCR
CS0BCR
CS6BBCR
RWTCNT
CS6BWCR
CMNCR
RTCSR
RTCOR
RTCNT
SDCR
Rev. 4.00 Sep. 14, 2005 Page 271 of 982
Section 12 Bus State Controller (BSC)
BSC
REJ09B0023-0400