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參數(shù)資料
| 型號： | UPD75104AGC |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCOMPUTER |
| 中文描述： | 4位單片機 |
| 文件頁數(shù)： | 35/66頁 |
| 文件大?。?/td> | 460K |
| 代理商： | UPD75104AGC |
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μ
PD75104A, 75108A
35
(3)
Symbols in addressing area field
*1
MB = MBE . MBS
(MBS = 0, 1, 15)
MB = 0
MBE = 0 :MB = 0 (00H-7FH)
MB = 15 (80H-FFH)
MBE = 1 :MB = MBS (MBS = 0, 1, 15)
*2
*3
Data memory
addressing
*4
MB = 15, fmem =FB0H-FBFH,
FF0H-FFFH
*5
*6
MB = 15, pmem = FC0H-FFFH
μ
PD75104A
addr = 0000H-0FFFH
μ
PD75108A
addr = 0000H-1F7FH
addr = (Current PC) – 15 to (Current PC) – 1
(Current PC) + 2 to (Current PC) + 16
μ
PD75104A
caddr = 0000H-0FFFH (PC
11
= 0)
μ
PD75108A
caddr = 0000H-0FFFH (PC
12
= 0) or 1000H-1F7FH (PC
12
= 1)
faddr = 0000H-07FFH
taddr = 0020H-007FH
*7
Program memory
addressing
*8
*9
*10
Remarks
MB indicates memory bank that can be accessed.
In *2, MB = 0 regardless of MBE and MBS.
In *4 and *5, MB = 15 regardless of MBE and MBS.
*6 to *10 indicate areas that can be addressed.
(4)
Machine cycle field
In this field, S indicates the number of machine cycles required when an instruction having a skip
function skips. The value of S varies as follows:
When no instruction is skipped ........................................................................
When 1-byte or 2-byte instruction is skipped.................................................
When 3-byte instruction (BR ! adder or CALL ! adder) is skipped ..............
S = 0
S = 1
S = 2
Note : The GETI instruction is skipped in one machine cycle.
One machine cycle equals to one cycle of the CPU clock
Φ
, (= t
CY
), and can be changed in three steps
depending on the setting of the processor clock control register (PCC).
相關PDF資料 |
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|---|---|
| UPD75108A | 4-BIT SINGLE-CHIP MICROCOMPUTER |
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| UPD75104CW | 4-BIT SINGLE-CHIP MICROCOMPUTER |
| UPD75104GF | 4-BIT SINGLE-CHIP MICROCOMPUTER |
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