MCS11 datasheet(96/108 Pages) PADAUK

96 / 108 page

MCS11

ADC-Type Enhanced FPPA

TM Controller

Page 96 of 108

PDK-DS-MCS11_v020 – Apr. 20, 2018

7-5. Bit Operation Instructions

set0

IO.n

Set bit n of IO port to low

Example:

set0

pa.5 ;

Result: set bit 5 of port A to low

Affected flags: 『N』Z

『N』C

『N』AC

『N』OV

set1

IO.n

Set bit n of IO port to high

Example:

set1

pb.5 ;

Result: set bit 5 of port B to high

Affected flags: 『N』Z

『N』C

『N』AC

『N』OV

tog

IO.n

Toggle bit state of bit n of IO port

Example:

tog

pa.5 ;

Result: toggle bit 5 of port A

Affected flags: 『N』Z

『N』C

『N』AC

『N』OV

set0

M.n

Set bit n of memory to low

Example:

set0

MEM.5 ;

Result: set bit 5 of MEM to low

Affected flags: 『N』Z

『N』C

『N』AC

『N』OV

set1

M.n

Set bit n of memory to high

Example:

set1

MEM.5 ;

Result: set bit 5 of MEM to high

Affected flags: 『N』Z

『N』C

『N』AC

『N』OV

swapc

IO.n

Swap the nth bit of IO port with carry bit

Example:

swapc

IO.0;

Result: C ← IO.0 , IO.0 ← C

When IO.0 is a port to output pin, carry C will be sent to IO.0;

When IO.0 is a port from input pin, IO.0 will be sent to carry C;

Affected flags: 『N』Z

『Y』C

『N』AC

『N』OV

Application Example (serial output) :

------------------------------------------------------------------------------------------------------------------------

…

set1

pac.0 ;

// set PA.0 as output

…

set0

flag.1 ;

// C=0

swapc

pa.0 ;

// move C to PA.0 (bit operation), PA.0=0

set1

flag.1 ;

// C=1

swapc

pa.0 ;

// move C to PA.0 (bit operation), PA.0=1

…

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