NT68F62 Datasheet, PDF (42/57 Pages) List of Unclassifed Manufacturers – 8-Bit Microcontroller for Monitor (32K Flash MTP Type)

NT68F62
Interrupt
IRQ0/1 Group
Service Routine
Polling
Need
No
Polling
INTS?
yes
INTS
?
DDC2
yes
Change To DDC2
Slave Mode &
RECEIVING Mode
Put Slave Addr. Into
CH0ADDR Reg.
Open INTA
Need
No
Polling
INTA?
yes
INTA
No
?
yes
WRITE
Mode
Need
Polling
INTRX?
yes
INTRX
?
yes
No
No
Need
No
Polling
INTTX?
yes
READ
Mode
No
INTTX
?
yes
Need
Polling
No
INTNAK?
yes
Need
No
Polling
INTV?
yes
INTNAK?
yes
No
INTV
No
?
DDC1
yes
Read Out the SRW bit
Reset Buffer Index
Read One Byte
Data From
CH0RXDAT Reg.
Trans.
No
Over
?
Change To
DDC1 Mode
(MD_CON = 1)
READ Mode
?
No
Open
INTRX, INTNAK
& INTA
yes
Put One Byte data Into
CH0TXDAT Reg.
Open
INTTX, INTNAK &
INTA
Recv.
No
Over
?
yes
Return to
No
DDC1?
yes
yes
Put $FF Into
CH0TXDAT Reg.
(release SDA line)
Return to
DDC1?
yes
No
Open
INTTX, INTNAK
& INTA
Put One Byte
Data Into
CH0TXDATReg.
Open
INTTX & INTS
Other INT.
Service
Open
INTA & INTV
Open
INTA
Open
INTA & INTV
Open
INTA
Open
INTRX, INTNAK &
INTA
Transmission failed
System release SCL &
SDA & send out STOP
condition User can do
some process
Return
SLAVE Mode Operation
Figure 15.6. Slave Mode INT Operation
42