UPD75518 NEC, UPD75518 Datasheet - Page 24

• Manufacturer Part Number: UPD75518
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

24
Address
FBAH
FBBH
FBCH
FBDH
FBEH
FCCH
FB0H
FB2H
FB3H
FB4H
FB5H
FB6H
FB7H
FB8H
FB9H
FBFH
FC0H
FC1H
FC2H
FC3H
FC8H
Remarks 1. IE
Program status word (PSW)
Interrupt priority select register (IPS)
Processor clock control register (PCC)
INT0 mode register (IM0)
INT1 mode resistor (IM1)
INT2 mode register (IM2)
System clock control register (SCC)
Bit sequential buffer 0 (BSB0)
Bit sequential buffer 1 (BSB1)
Bit sequential buffer 2 (BSB2)
Bit sequential buffer 3 (BSB3)
Serial operation mode register 1 (CSIM1)
CSIE1
Serial I/O shift register 1 (SIO0)
2. IRQ
IST1
IE4
IE1
b3
Hardware name (symbol)
: Interrupt enable flag
: Interrupt request flag
IRQ4
IRQ1
IST0
b2
IECSI0
IETPG
MBE
IEBT
IET0
IEW
IE0
IE2
Fig. 2-5
b1
IRQCSI0
IRQTPG
IRQBT
IRQT0
IRQW
IRQ0
IRQ2
RBE
EOT
PD75518(A) I/O Map (2/4)
b0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
W
W
W
W
W
W
R
1 bit
–
–
–
–
–
–
–
–
Number of bits that
can be manipulated
4 bits
–
–
–
–
–
–
8 bits
–
–
–
–
–
–
–
Bit
manipulation
addressing
pmem.@L
fmem.bit
fmem.bit
mem.bit
mem.bit
Manipulated
with EI/DI
instruction
Bit 2 is fixed
to 0
Bits 3, 2, and
1 are fixed to
0
Bits 3 and 2
are fixed to
0
Bits 2 and 1
are fixed to 0
Only bit 7
allows bit
manipulation.
PD75518(A)
Remarks