UPD75218 NEC, UPD75218 Datasheet - Page 30
UPD75218
Manufacturer Part Number
UPD75218
Description
4-BIT SINGLE-CHIP MICROCOMPUTER
Manufacturer
NEC
Datasheet
1.UPD75218.pdf
(62 pages)
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30
(2) Legend
A
B
C
D
E
H
L
X
XA
BC
DE
HL
XA’
BC’
DE’
HL’
PC
SP
CY
PSW
MBE
RBE
PORTn : Port n (n = 0 to 6)
IME
IPS
IE
RBS
MBS
PCC
.
(
H
)
: Register pair (BC), 8-bit accumulator
: Register pair (HL), 8-bit accumulator
: Extended register pair (XA’)
: Extended register pair (DE’)
: Program counter
: Stack pointer
: Carry flag, bit accumulator
: Memory bank enable flag
: Interrupt master enable flag
: Interrupt enable flag
: Memory bank select register
: Processor clock control register
: Address/bit delimiter
: Contents addressed by
: Hexadecimal data
: A register, 4-bit accumulator
: B register, 4-bit accumulator
: C register, 4-bit accumulator
: D register, 4-bit accumulator
: E register, 4-bit accumulator
: H register, 4-bit accumulator
: L register, 4-bit accumulator
: X register, 4-bit accumulator
: Register pair (XA), 8-bit accumulator
: Register pair (DE), 8-bit accumulator
: Extended register pair (BC’)
: Extended register pair (HL’)
: Program status word
: Register bank enable flag
: Interrupt priority specification register
: Register bank select register
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