DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 170

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

Figure 6.1 shows a block diagram of the bus controller.
Rev.7.00 Dec. 24, 2008 Page 116 of 698
REJ09B0074-0700
Chip select signals
External bus control signals
BREQ*
BACK*
WAIT*
Legend:
ABWCR:
ASTCR:
WCRH, WCRL:
BCRH, BCRL:
Note: * Supported only by the H8S/2218 Group.
Bus width control register
Access state control register
Waite control registers H, L
Bus control registers H, L
Figure 6.1 Block Diagram of Bus Controller
controller
Wait
Area decorder
Bus arbiter
controller
Bus
ABWCR
ASTCR
WCRH
BCRH
WCRL
BCRL
CPU bus request signal
DMAC bus request signal
CPU bus acknowledge signal
DMAC bus acknowledge signal
Internal control
signals
Bus mode signal
Internal
address bus