參數(shù)資料
型號(hào)： μPDPD30101
廠商： NEC Corp.
英文描述： 64-Bit Micro[rocessor(64位微處理器)
中文描述： 64位微[rocessor（64位微處理器）
文件頁(yè)數(shù)： 41/97頁(yè)
文件大?。?/td> 409K
代理商： ΜPDPD30101
μ
PD30101
40
5. BCU (BUS CONTROL UNIT)
5.1 General
The BCU transfers data with the V
R
4100 CPU core via SysAD bus (internal) inside the V
R
4101. It also controls an
external LCD controller, DRAM, ROM (flash memory or mask ROM), and PCMCIA controller via system bus, and
transfers data with these devices via ADD bus and DATA bus.
The BCU basically operates with internal bus clock TClock.
Table 5-1. BCU Registers
Symbol
Function
BCUCNTREG
BCU control register
BCUBRREG
BCU bus operation interval specification register
BCUBRCNTREG
BCU bus operation interval count register
BCUBCLREG
BCU bus operation interval enable register
BCUBCLCNTREG
BCU bus operation interval enable count register
BCUSPEEDREG
BCU access cycle change register
BCUERRSTREG
BCU bus error status register
BCURFCNTREG
BCU refresh cycle count register
PREVIDREG
Peripheral unit revision ID register
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