455A Datasheet, PDF (131/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

455A Group
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Detailed description
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− Transfers the high-order 4 bits of prescaler to register B.
Transfers the low-order 4 bits of prescaler to register A.
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− Transfers the contents of register B to the high-order 4 bits of prescaler and prescaler reload register RPS.
Transfers the contents of register A to the low-order 4 bits of prescaler and prescaler reload register RPS.
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− Transfers the high-order 4 bits (T17−T14) of timer 1 to register B.
Transfers the low-order 4 bits (T13−T10) of timer 1 to register A.
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− Transfers the contents of register B to the high-order 4 bits of timer 1 and timer 1 reload register R1L.
Transfers the contents of register A to the low-order 4 bits of timer 1 and timer 1 reload register R1L.
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− Transfers the contents of register B to the high-order 4 bits (R17−R14) of reload register R1, and the contents
of register A to the low-order 4 bits (R13−R10) of reload register R1.
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− Transfers the high-order 4 bits (T27−T24) of timer 2 to register B.
Transfers the low-order 4 bits (T23−T20) of timer 2 to register A.
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− Transfers the contents of register B to the high-order 4 bits (R2L7−R2L4) of timer 2 and timer 2 reload register
R2L. Transfers the contents of register A to the low-order 4 bits (R2L3−R2L0) of timer 2 and timer 2 reload
register R2L.
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− Transfers the contents of register B to the high-order 4 bits (R2H7−R2H4) of timer 2 and timer 2 reload
register R2H. Transfers the contents of register A to the low-order 4 bits (R2H3−R2H0) of timer 2 and timer 2
reload register R2H.
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− Transfers the contents of timer 2 reload register R2L to timer 2.
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− Transfers the contents of register A to timer LC and reload register RLC.
V12 = 0 : (T1F) = 1 − When V12 = 0 : Clears (0) to the T1F flag and skips the next instruction when timer 1 interrupt request flag
T1F is “1”. When the T1F flag is “0”, executes the next instruction.
When V12 = 1 : This instruction is equivalent to the NOP instruction.
(V12: bit 2 of interrupt control register V1)
V13 = 0 : (T2F) = 1 − When V13 = 0 : Clears (0) to the T2F flag and skips the next instruction when timer 2 interrupt request flag
T2F is “1”. When the T2F flag is “0”, executes the next instruction.
When V13 = 1 : This instruction is equivalent to the NOP instruction.
(V13: bit 3 of interrupt control register V1)
V20 = 0 : (T3F) = 1 − When V20 = 0 : Clears (0) to the T3F flag and skips the next instruction when timer 3 interrupt request flag
T3F is “1”. When the T3F flag is “0”, executes the next instruction.
When V20 = 1 : This instruction is equivalent to the NOP instruction.
(V20: bit 0 of interrupt control register V2)
Rev.1.01 Feb 15, 2008 Page 131 of 146
REJ03B0224-0101