M306V2 Mitsubishi, M306V2 Datasheet - Page 42

• Manufacturer Part Number: M306V2
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: Mitsubishi

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Table 2.5.3 Port status during wait mode
__________
Address bus, data bus, CS0 to CS3
_____
RD, WR, BHE, WRL, WRH
HLDA,BCLK
ALE
Port
CLK
2.5.6 Wait Mode
When a WAIT instruction is executed, the BCLK stops and the microcomputer enters the wait mode. In
this mode, oscillation continues but the BCLK and watchdog timer stop. Writing “1” to the WAIT peripheral
function clock stop bit and executing a WAIT instruction stops the clock being supplied to the internal
peripheral functions, allowing power dissipation to be reduced. Table 2.5.3 shows the status of the ports
in wait mode.
Wait mode is cancelled by a hardware reset or an interrupt. If an interrupt is used to cancel wait mode, the
microcomputer restarts from the interrupt routine using as BCLK, the clock that had been selected when
the WAIT instruction was executed.
OUT
______ ________ ________ _________
Pin
When f
When f
_______
C
8
, f
selected
32
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
selected Valid only in single-chip mode
_______
Retains status before wait mode
“H”
“H”
“H”
Retains status before wait mode
Valid only in single-chip mode
Memory expansion mode
Microprocessor mode
and ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
Retains status before wait mode
Does not stop
Does not stop when the WAIT
peripheral function clock stop
bit is “0”.
When the WAIT peripheral
function clock stop bit is “1”,
the status immediately prior
to entering wait mode is main-
tained.
M306V2ME-XXXFP
Single-chip mode
M306V2EEFP
Rev. 1.0