參數(shù)資料
型號(hào)： UPD75312A
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)： 38/62頁
文件大?。?/td> 577K
代理商： UPD75312A
μ
PD75312(A), 75316(A)
38
(3) Symbols in addressing area field
*1
MB = MBE . MBS
(MBS = 0, 1, 15)
MB = 0
*2
*3
MBE = 0 : MB = 0 (00H-7FH)
MB = 15 (80H-FFH)
MBE = 1 : MB = MBS (MBS = 0, 1, 15)
MB = 15, fmem = FB0H-FBFH,
FF0H-FFFH
MB = 15, pmem = FC0H-FFFH
μ
PD75312(A)
addr = 0000H-2F7FH
μ
PD75316(A)
addr = 0000H-3F7FH
addr = (Current PC) – 15 to (Current PC) – 1
(Current PC) + 2 to (Current PC) + 16
μ
PD75312(A)
caddr =0000H-0FFFH (PC
13
= 0, PC
12
= 0) or
1000H-1FFFH (PC
13
= 0, PC
12
= 1) or
2000H-2F7FH (PC
13
= 1, PC
12
= 0)
μ
PD75316(A)
caddr =0000H-0FFFH (PC
13
= 0, PC
12
= 0) or
1000H-1FFFH (PC
13
= 0, PC
12
= 1) or
2000H-2FFFH (PC
13
= 1, PC
12
= 0) or
3000H-3F7FH (PC
13
= 1, PC
12
= 1)
Data memory
addressing
*4
*5
*6
*7
*8
Program
memory
addressing
*9
*10
faddr = 0000H-07FFH
taddr = 0020H-007FH
Remarks
1:
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.
2:
3:
4:
(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 .................................................................................. S = 0
When 1-byte or 2-byte instruction is skipped........................................................... S = 1
When 3-byte instruction (BR ! addr or CALL ! addr) is skipped ............................ 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).
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