4554 Datasheet, PDF (97/138 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4554 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
TABPS (Transfer data to Accumulator and register B from PreScaler)
Instruction
code
D9
D0
Number of
1001110101
275
2
16
words
1
Number of
cycles
1
Flag CY
–
Skip condition
–
Operation:
(B) ← (TPS7–TPS4)
(A) ← (TPS3–TPS0)
Grouping: Timer operation
Description: Transfers the high-order 4 bits (TPS7–
TPS4) of prescaler to register B, and
transfers the low-order 4 bits (TPS3–TPS0)
of prescaler to register A.
TAD (Transfer data to Accumulator from register D)
Instruction
code
D9
D0
Number of Number of Flag CY
0001010001
051
words
cycles
2
16
1
1
–
Skip condition
–
Operation:
(A2–A0) ← (DR2–DR0)
(A3) ← 0
Grouping: Register to register transfer
Description: Transfers the contents of register D to the
low-order 3 bits (A2–A0) of register A.
Note:
When this instruction is executed, “0” is
stored to the bit 3 (A3) of register A.
TAI1 (Transfer data to Accumulator from register I1)
Instruction
code
D9
D0
Number of Number of Flag CY
1001010011
253
words
cycles
2
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
1001010100
254
words
cycles
2
16
1
1
–
Skip condition
–
Operation: (A) ← (I2)
Grouping: Interrupt operation
Description: Transfers the contents of interrupt control
register I2 to register A.
Rev.3.00 Aug 06, 2004 page 97 of 136
REJ03B0043-0300Z