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COM
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7.6 Structure creation instructions
7.6.10 Select Refresh Instruction (COM)
Refresh between the multiple CPUs by the COM instruction is performed under
the following condition.
• Receiving operation from other CPUs : When b4 of SD778 (auto refresh in the
CPU shared memory) is 1.
• Sending operation from host CPU : When b15 of SD778 (communication
with peripheral device is executed/not
executed) is 0.
[ LCPU]
Example:To speed up processing of the display unit only, specify communication with
the display unit only. (Write "1" to bits b14 and b15 of SD778 (SD778:C000
H))
Bit of SD778 Executed Not Executed
b0 to b3, b14
10
b15
01
b15
b0
b1b2
b3
b14 b13 to b4
Auto refresh with intelligent
function module
001/0 1/0 1/01/0 1/0
SD778
Communication with display unit
Communication with peripheral
device
I/O refresh
CC-Link refresh
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