UPD75208 NEC, UPD75208 Datasheet - Page 27

• Manufacturer Part Number: UPD75208
• Description: 4-BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

(2)
Legend for operation description
A
B
C
D
E
H
L
X
XA
BC
DE
HL
XA’
BC’
DE’
HL’
PC
SP
CY
PSW
MBE
RBE
PORTn
IME
IPS
IE
RBS
MBS
PCC
•
(
H
)
: A register; 4-bit accumulator
: B register
: C register
: D register
: E register
: H register
: L register
: X register
: Register pair (BC)
: Register pair (HL)
: Expanded register pair (XA’)
: Expanded register pair (BC’)
: Expanded register pair (DE’)
: Expanded register pair (HL’)
: Program counter
: Stack pointer
: Carry flag; Bit accumulator
: Program status word
: Memory bank enable flag
: Register bank enable flag
: Port n (n = 0 to 6)
: Interrupt master enable flag
: Interrupt priority select register
: Interrupt enable flag
: Register bank select register
: Memory bank select register
: Processor clock control register
: Address and bit delimiter
: Contents addressed by
: Hexadecimal data
: Register pair (XA); 8-bit accumulator
: Register pair (DE)
PD75208
27