UPD75518 NEC, UPD75518 Datasheet - Page 23

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

Address
F80H
F82H
F83H
F84H
F85H
F86H
F90H
F94H
F96H
FA0H
FA2H
FA4H
FA6H
Notes 1.
F98H
2. TOE0: Timer/event counter 0 output enable flag (W)
TOE0
Stack pointer (SP)
Register bank select register
(RBS)
Memory bank select register
(MBS)
Stack bank select register (SBS)
Basic interval timer mode register (BTM)
Basic interval timer (BT)
Timer pulse generator (TPGM)
Timer/pulse generator modulo register (MODL)
Timer/pulse generator modulo register (MODH)
Timer/event counter 0 mode register (TM0)
Timer/event counter 0 count register (T0)
Timer/event counter 0 modulo register (TMOD0)
Clock mode register (WM)
Can be operated separately as the RBS and MBS during 4-bit manipulation.
Can also be operated as the BS during 8-bit manipulation.
b3
Note 2
Hardware name (symbol)
b2
Fig. 2-5
b1
Bank select
register (BS)
PD75518(A) I/O Map (1/4)
b0
R/W
R/W
R/W
R/W
R/W
W
W
W
W
W
R
R
W
R
–
1 bit
–
–
–
–
–
–
–
–
–
–
–
–
–
Number of bits that
can be manipulated
4 bits
–
–
–
–
–
–
–
–
–
–
–
–
–
8 bits
–
–
–
Bit
manipulation
addressing
mem.bit
mem.bit
mem.bit
mem.bit
PD75518(A)
Bit 0 is fixed
to 0
Bits 3 and 2
are always
set to 0.
Only bit 3 can
be manipulat-
ed
Only bit 3 can
be manipulat-
ed
Only bit 3
allows bit
manipulation.
Remarks
Note 1
23