4554 Datasheet, PDF (125/138 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4554 Group
Skip condition
Datailed description
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(P) = 1
(WDF1) = 1
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– Transfers the contents of key-on wakeup control register K0 to register A.
– Transfers the contents of register A to key-on wakeup control register K0.
– Transfers the contents of key-on wakeup control register K1 to register A.
– Transfers the contents of register A to key-on wakeup control register K1.
– Transfers the contents of key-on wakeup control register K2 to register A.
– Transfers the contents of register A to key-on wakeup control register K2.
– Transferts the contents of register A to port output format control register FR0.
– Transferts the contents of register A to port output format control register FR1.
– Transferts the contents of register A to port output format control register FR2.
– Transfers the contents of LCD control register L1 to register A.
– Transfers the contents of register A to LCD control register L1.
– Transfers the contents of register A to LCD control register L2.
– _{Transfers the contents of register A to LCD control register L3.}
– _{Selects the ceramic resonator for main clock, stops the on-chip oscillator (internal oscillator).}
– _{Selects the RC oscillation circuit for main clock, stops the on-chip oscillator (internal oscillator).}
– _{Transfers the contents of clock control regiser MR to register A.}
– _{Transfers the contents of register A to clock control register MR.}
– _{No operation; Adds 1 to program counter value, and others remain unchanged.}
– _{Puts the system in clock operating mode by executing the POF instruction after executing the EPOF instruction.}
– _{Puts the system in RAM back-up state by executing the POF2 instruction after executing the EPOF instruction.}
– _{Makes the immediate after POF or POF2 instruction valid by executing the EPOF instruction.}
– _{Skips the next instruction when the P flag is “1”.}
After skipping, the P flag remains unchanged.
– _{Skips the next instruction when watchdog timer flag WDF1 is “1.” After skipping, clears (0) to the WDF1 flag.}
Also, stops the watchdog timer function when executing the WRST instruction immediately after the DWDT
instruction.
– _{Stops the watchdog timer function by the WRST instruction after executing the DWDT instruction.}
– _{Sets referring data area to pages 0 to 63 when the TABP p instruction is executed.}
This instruction is valid only for the TABP p instruction.
– _{Sets referring data area to pages 64 to 127 when the TABP p instruction is executed.}
This instruction is valid only for the TABP p instruction.
– _{Validates the voltage drop detection circuit at power down (clock operating mode and RAM back-up mode)}
when VDCE pin is “H”.
Rev.3.00 Aug 06, 2004 page 125 of 136
REJ03B0043-0300Z