參數(shù)資料
型號(hào)： UPD75068A
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)： 33/68頁
文件大小： 640K
代理商： UPD75068A
33
μ
PD75064, 75066, 75068, 75064(A), 75066(A), 75068(A)
HL
PC
SP
CY
PSW
MBE
PORTn : Port n (n = 0 to 6, 11)
IME
: Interrupt master enable flag
IE
×××
: Interrupt enable flag
MBS
: Memory bank selection register
PCC
: Processor clock control register
.
: Address bit delimiter
(
××
)
: Contents addressed by
××
××
H
: Hexadecimal data
: Pair register (HL)
: Program counter
: Stack pointer
: Carry flag; Bit accumulator
: Program status word
: Memory bank enable flag
(3) Symbols used for the addressing area column
Remarks 1.
MB indicates the memory bank that can be accessed.
2.
For *2, MB = 0 regardless of MBE and MBS settings.
3.
For *4 and *5, MB = 15 regardless of MBE and MBS.
4.
For *6 to *10, each addressable area is indicated.
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)
MB = 15, fmem = FB0H - FBFH,
FF0H - FFFH
MB = 15, pmem = FC0H - FFFH
PD75064 addr = 0000H - 0FFFH
PD75066 addr = 0000H - 177FH
PD75068 addr = 0000H - 1F7FH
addr = (Current PC) – 15 to (Current PC) – 1
(Current PC) + 2 to (Current PC) + 16
PD75064 caddr = 0000H - 0FFFH
PD75066 caddr = 0000H - 0FFFH (PC
PD75068 caddr = 0000H - 0FFFH (PC
= 1000H - 1F7FH (PC
12
= 1)
faddr = 0000H - 07FFH
taddr = 0020H - 007FH
12
= 0) or
12
= 0) or
*1
*2
*3
*4
*5
*6
*7
*8
*9
*10
Data memory
addressing
Program memory
addressing
μ
μ
μ
μ
μ
μ
= 1000H - 177FH (PC
12
= 1)
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