參數(shù)資料
型號： UPD75402AC
廠商： NEC Corp.
英文描述： 4 BIT SINGLE-CHIP MICROCOMPUTER
中文描述： 4位單片機(jī)
文件頁數(shù)： 26/48頁
文件大?。?/td> 515K
代理商： UPD75402AC
26
μ
PD75402A(A)
(3) Explanation of the symbols in the addressing area field
Remarks 1.
MB indicates an accessible memory bank.
2.
*4 to *7 indicate each addressable area.
(4) Explanation of the machine cycle field
S indicates the number of machine cycles required for a skip instruction to perform skipping. The following
shows the values of S.
When the next instruction is not skipped, S is 0.
When the next instruction is skipped, S is 1.
A machine cycle is equal to one cycle (= t
CY
) of CPU clock
Φ
. A PCC setting determines the machine cycle.
It can be set to one of three different periods.
MB = 0
MB = 0 (00H - 3FH)
MB = 15 (80H - FFH)
MB = 15, fmem = FB0H - FBFH or
FF0H - FFFH
addr = 000H - 77FH
addr = (Current PC) – 15 to (Current PC) – 1 or
(Current PC) + 16 to (Current PC) + 2
caddr = 000H - 77FH
faddr = 000H - 77FH
*1
*2
*3
*4
*5
*6
*7
Data memory
addressing
Program memory
addressing
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