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參數(shù)資料
| 型號： | UPD75206 |
| 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)： | 28/62頁 |
| 文件大?。?/td> | 489K |
| 代理商： | UPD75206 |
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28
μ
PD75206
*1
MB = MBE MBS
(MBS = 0, 1, 15)
*2
MB = 0
*3
MBE = 0 : MB = 0 (00H to 7FH)
MB = 15 (80H to FFH)
MBE = 1 : MB = MBS (MBS = 0, 1, 15)
*4
MB = 15, fmem = FB0H to FBFH,
FF0H to FFFH
*5
MB = 15, pmem = FC0H to FFFH
*6
addr = 0000H to 177FH
*7
addr = (Current PC) – 15 to (Current PC) – 1,
(Current PC) + 2 to (Current PC) + 16
*8
caddr = 0000H to 0FFFH
1000H to 177FH
(PC
12
= 0) or
(PC
12
= 1)
*9
faddr = 0000H to 07FFH
*10
taddr = 0020H to 007FH
(3)
Description of symbols in the addressing area column
Data Memory
Addressing
Program Memory
Addressing
Remarks
1.
2.
3.
4.
MB indicates accessible memory bank.
In *2, MB = 0 irrespective of MBE and MBS.
In *4 and *5, MB = 15 irrespective of MBE and MBS.
*6 to *10 indicate addressable areas.
(4)
Description of the machine cycle column
S indicates the number of machine cycles required for skip operation by an instruction having skip function.
The S value varies as follows:
When not skipped ...................................................................................................S = 0
When 1-byte or 2-byte instructions are skipped.................................................S = 1
When 3-byte instructions are skipped (BR !addr, CALL !addr instruction)..... S = 2
Note
GETI instruction is skipped in one machine cycle.
One machine cycle is equal to one cycle(=t
CY
) of CPU clock
Φ
and three time periods are available
according to PCC setting.
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