參數(shù)資料
型號: UPD703204
廠商: NEC Corp.
英文描述: 32-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 32位單晶片微控制器
文件頁數(shù): 29/98頁
文件大?。?/td> 797K
代理商: UPD703204
Preliminary Product Information U15436EJ1V0PM
29
μ
PD703201, 703201Y, 703204, 703204Y, 70F3201, 70F3201Y, 70F3204, 70F3204Y
The number of basic clocks required for accessing each area in the address space is as follows.
Table 5-3. Number of Access Clocks
Area (Bus Width)
Bus Cycle Type
Internal ROM
(32 Bits)
Internal RAM
(32 Bits)
External Memory
(16 Bits)
Instruction fetch (normal access)
1
1 or 2
3 + n
Note
Instruction fetch (branch)
2
1 or 2
3 + n
Note
Operand data access
3
1
3 + n
Note
Note
2 + n clocks when the separate bus is selected. n is the number of waits.
Figure 5-1. Example of Timing In Separate Bus Mode (Read
Write)
T1
T2
Address
Address
Data
Data
WAIT (input)
AD0 to AD15 (I/O)
WR0, WR1 (output)
RD (output)
A0 to A23 (output)
CLKOUT (output)
T2
T1
Remark
The broken lines indicates the high-impedance state
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