Application System Example - Renesas NU85E Preliminary User's Manual

1.2 Application System Example

ASIC
VFB
ROM
Debug
controller
Instruction
cache
Data cache
VDB
RAM
Remark VFB: Dedicated bus for ROM direct coupling (V850E fetch bus)
VDB: Dedicated bus for RAM direct coupling (V850E data bus)
Caution In this manual, representations related to the memory connected to the NU85E are unified as
follows.
• • • • RAM: NU85E direct-coupled RAM (connected to VDB)
• • • • ROM: NU85E direct-coupled ROM (connected to VFB)
• • • • External memory: RAM or ROM connected via the memory controller (MEMC)
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CHAPTER 1 INTRODUCTION
NU85E
Standby control unit
DMA control unit
CPU
Interrupt control unit
RCU interface
Instruction cache Bus bridge
interface
Bus control unit
Data cache interface
Test interface control unit
(connected via VSB)
Preliminary User's Manual A14874EJ3V0UM
(STBC)
(DMAC)
Timer
(INTC)
NPB (NEC peripheral I/O bus)
(BBR)
VSB (V850E system bus)
(BCU)
Memory controller
(TIC)
Test bus
External memory
Clock control Clock generator
circuit (CG)
UART
User logic
(MEMC)