Renesas SH7781 - Manual (Page 38)

1. Overview
Rev.1.00 Jan. 10, 2008 Page 8 of 1658
REJ09B0261-0100
Item Features
PCI bus controller
(PCIC) • PCI bus controller (supports a subset of revision 2.2)
⎯ 32-bit bus (33 MHz or 66 MHz)
• Operation as PCI master/target
• Operation in PCI host/normal mode
⎯ Built-in bus arbiter (host mode)
• Operates with up to four external bus-master devices
• Mode for operation with an external bus arbiter
• Supports burst transfers
• Supports parity checking and error reports
• Supports four individual external interrupt signals (
INTA to INTD) in host
mode
• Supports a single external interrupt signal ( INTA) in normal mode
• Up to 512 Mbytes of PCI memory space (32 bit address mode)
• Up to 64 Mbytes of PCI memory space (29 bit address mode)
Direct memory
access controller
(DMAC) • Number of channels: 12
• 12-channel physical address DMA controller
• Four channels support external requests (channels 0 to 3)
• Address space: 4 Gbytes (Physical address)
• Units of data transfer: 8, 16, or 32 bits; 16 or 32 bytes
• Address modes:
⎯ Dual address mode
• Transfer requests: External request, on-chip peripheral module request,
or auto-request
• Choice of DACK or DRAK (four external pins)
• Bus modes: Cycle-stealing or burst mode
• Priority: Select either fixed mode or round-robin mode
Clock pulse
generator (CPG) • CPU frequency: Up to 600 MHz
• Local bus frequency: Up to 100 MHz
• DDR2-SDRAM interface frequency: Up to 300 MHz
• On-chip peripheral bus frequency: Up to 50 MHz
• Power-down modes
⎯ Sleep mode
⎯ Module-standby mode
⎯ DDR back-up power function (power is supplied only to the DDR)