參數(shù)資料
型號(hào)： UPD70208HGK-12-9EU
廠商： NEC Corp.
英文描述： V40HLTM, V50HLTM 16/8, 16-BIT MICROPROCESSOR
中文描述： V40HLTM，V50HLTM 16 / 8，16位微處理器
文件頁數(shù)： 27/110頁
文件大小： 625K
代理商： UPD70208HGK-12-9EU
27
μ
PD70208H, 70216H
Data Sheet U13225EJ4V0DS00
7.
WCU (WAIT CONTROL UNIT)
The WCU has the function of automatically inserting a wait state (TW) of 0 to 3 clock cycles in a CPU, DMAU or REFU
bus cycle.
7.1
FEATURES
Automatic setting of 0 to 3 waits for a CPU memory bus cycle
1M-byte memory space can be divided into 5
64K-byte I/O space can be divided into 3
Automatic setting of 0 to 3 waits for an external I/O cycle
Automatic setting of 0 to 3 waits for a DMA cycle
Automatic setting of 0 to 3 waits for a refresh cycle
Same as V40 and V50 directly after a reset (memory space divided into 3, no division of I/O space)
Figure 7-1. Example of Memory Space Division
Remark
The division specification and the size of each block are set by means of a system I/O area register.
FFFFFH
00000H
1 M-Byte
Memory Area
Upper Memory Block
Middle Memory Block
Lower Memory Block
Lower Sub
Memory Block
Upper Sub
Memory Block
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD70208HGK-16-9EU 制造商:NEC 制造商全稱:NEC 功能描述:V40HLTM, V50HLTM 16/8, 16-BIT MICROPROCESSOR
UPD70208HGK-20-9EU 制造商:NEC 制造商全稱:NEC 功能描述:V40HLTM, V50HLTM 16/8, 16-BIT MICROPROCESSOR
UPD70208HLP-10 制造商:NEC 制造商全稱:NEC 功能描述:V40HLTM, V50HLTM 16/8, 16-BIT MICROPROCESSOR
UPD70208HLP-12 制造商:NEC 制造商全稱:NEC 功能描述:V40HLTM, V50HLTM 16/8, 16-BIT MICROPROCESSOR
UPD70208HLP16 制造商: 功能描述: 制造商:undefined 功能描述:
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