D75108CW NEC, D75108CW Datasheet - Page 36

• Manufacturer Part Number: D75108CW
• Description: Search -----> UPD75108CW
• Manufacturer: NEC

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36
(3)
(4)
function skips. The value of S varies as follows:
depending on the setting of the processor clock control register (PCC).
Remarks • MB indicates memory bank that can be accessed.
*10
Symbols in addressing area field
Machine cycle field
In this field, S indicates the number of machine cycles required when an instruction having a skip
Note : The GETI instruction is skipped in one machine cycle.
One machine cycle equals to one cycle of the CPU clock
*1
*2
*3
*4
*5
*6
*7
*8
*9
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 ..............
MB = MBE . MBS
(MBS = 0, 1, 15)
MB = 0
MBE = 0 : MB = 0 (00H-7FH)
MBE = 1 : MB = MBS (MBS = 0, 1, 15)
MB = 15, fmem = FB0H-FBFH,
MB = 15, pmem = FC0H-FFFH
addr = (Current PC) – 15 to (Current PC) – 1
faddr = 000H-7FFH
taddr = 020H-07FH
PD75104
PD75106
PD75108
PD75104
PD75106
PD75108
• 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.
(Current PC) + 2 to (Current PC) + 16
MB = 15 (80H-FFH)
addr = 0000H-0FFFH
addr = 0000H-177FH
addr = 0000H-1F7FH
caddr = 0000H-0FFFH (PC
caddr = 0000H-0FFFH (PC
caddr = 0000H-0FFFH (PC
FF0H-FFFH
11
12
12
= 0)
= 0) or 1000H-177FH (PC
= 0) or 1000H-1F7FH (PC
, (= t
CY
), and can be changed in three steps
12
12
PD75104, 75106, 75108
= 1)
= 1)
Data memory
addressing
Program memory
addressing
S = 0
S = 1
S = 2