upd75238 Renesas Electronics Corporation., upd75238 Datasheet - Page 23
upd75238
Manufacturer Part Number
upd75238
Description
4 Bit Single-chip Microcomputer
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD75238.pdf
(190 pages)
- Current page: 23 of 190
- Download datasheet (2Mb)
Address
Notes 1.
FABH
FACH
F8AH
FA0H
FA2H
FA4H
FA6H
FA8H
F80H
F82H
F83H
F84H
F85H
F86H
F88H
F89H
F90H
F94H
F96H
F98H
2.
Stack pointer (SP)
Resister bank select register (RBS)
Memory bank select register (MBS)
Stack bank select register (SBS)
Basic interval timer mode register (BTM)
Basic interval timer (BT)
Display mode register (DSPM)
Dimmer select register (DIMS)
Timer pulse generator mode register (TPGM)
Timer pulse generator modulo register L
(MODL)
Timer pulse generator modulo register H (MODH)
Clock mode register (WM)
Timer/event counter 0 mode register (TM0)
Timer/event counter 0 count register (T0)
Timer/event counter 0 modulo register (TMOD0)
Event counter mode register (TM1)
Gate control register (GATEC)
Count register (T1)
TOE0
For the SEL instruction, these registers are both readable and writable.
Can be operated separately as the RBS and MBS during 4-bit manipulation.
Can also be operated as the BS during 8-bit manipulation.
KSF
b3
Hardware name (symbol)
Digit select register (DIGS)
b2
b1
Table 2-4
b0
PD75238 I/O Map (1/4)
R
R/W
R/W
R/W
R/W
R/W
R/W
Note 1
W
W
W
W
W
W
W
W
W
W
R
R
R
1 bit 4 bits 8 bits
Number of ma-
nipulatable bits
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Bit manipu-
lation ad-
dressing
mem.bit
mem.bit
mem.bit
Bit 0 is always set to
0.
Bits 2 and 3 are
always set to 0.
Only bit 3 allows bit
manipulation.
Only bit 3 allows a
bit test.
Only bit 3 allows bit
manipulation.
Only bit 3 allows bit
manipulation.
Only bit 3 allows bit
manipulation.
PD75238
Remarks
Note 2
23
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