4524 Datasheet, PDF (114/161 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4524 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
TADAB (Transfer data to register AD from Accumulator from register B)
Instruction
code
D9
D0
Number of
1
0
0
0
1
1
1
0
0
1
2
2
3
9 ₁₆
words
1
Number of
cycles
1
Flag CY
–
Skip condition
–
Operation:
(AD7–AD4) ← (B)
(AD3–AD0) ← (A)
Grouping: A/D conversion operation
Description: In the A/D conversion mode (Q13 = 0), this in-
struction is equivalent to the NOP instruction.
In the comparator mode (Q13 = 1), trans-
fers the contents of register B to the
high-order 4 bits (AD7–AD4) of comparator
register, and the contents of register A to
the low-order 4 bits (AD3–AD0) of compara-
tor register.
(Q13 = bit 3 of A/D control register Q1)
TAI1 (Transfer data to Accumulator from register I1)
Instruction
code
D9
D0
Number of Number of Flag CY
words
cycles
1
0
0
1
0
1
0
0
1
1
2
2
5
3 ₁₆
1
1
–
Skip condition
–
Operation: (A) ← (I1)
Grouping: Interrupt operation
Description: Transfers the contents of interrupt control
register I1 to register A.
TAI2 (Transfer data to Accumulator from register I2)
Instruction
code
D9
D0
Number of Number of Flag CY
words
cycles
1
0
0
1
0
1
0
1
0
0
2
2
5
4 ₁₆
1
1
–
Skip condition
–
Operation: (A) ← (I2)
Grouping: Interrupt operation
Description: Transfers the contents of interrupt control
register I2 to register A.
TAI3 (Transfer data to Accumulator from register I3)
Instruction
code
D9
D0
Number of Number of Flag CY
1001010101
255
words
cycles
2
16
1
1
–
Skip condition
–
Operation:
(A0) ← (I30)
(A3–A1) ← 0
Grouping: Interrupt operation
Description: Transfers the contents of interrupt control
register I3 to the lowermost bit (A0) of regis-
ter A.
Note: When the TAI3 instruction is executed, “0” is stored
to the high-order 3 bits (A3–A1) of register A.
Rev.2.00 Jul 27, 2004 page 114 of 159
REJ03B0091-0200Z