tea5766uk NXP Semiconductors, tea5766uk Datasheet - Page 17

• Manufacturer Part Number: tea5766uk
• Description: Tea5766uk Stereo Fm Radio + Rds
• Manufacturer: NXP Semiconductors

Fig 6. I
(1) Interrupt events that occur outside of the region A-B set their respective flag bits in the normal way immediately and can thus trigger a hardware interrupt if the mask
(2) The blocking of interrupts is marked by the region A-B
(3) Interrupt events that occur between A and B set their respective flags after the mask bits are cleared. Which means that in this diagram an interrupt event occurred in
(4) All interrupt mask bits are cleared after the interrupt flag and mask bytes are read.
(5) Software writes to the mask byte and enables the required mask bits. Any flags currently set will then trigger a hardware interrupt.
(6) INTX is set HIGH (inactive) after the interrupt mask bytes are read.
bits are set.
B
B
period A-B, so after A-B the flag goes to logic 1.
2
1
2
C-bus interrupt sequence, read and write operation
data
interrupt event
interrupt flag bit
interrupt mask bit
INTX
is when only the INTFLAG is read and a stop condition is received (only INTFLAG is read so only this will be cleared).
is when both registers are read and hence cleared and this is terminated by either an acknowledge or stop bit.
read access
S
address
device
R ack
(1)
A
0R data
INTFLAG
ack
B
1
1R data
INTMSK
(2)
1
/ B
2
ack
depending on the actual read cycle.
B
2
(3)
(4)
(6)
data
ack
write access
S
address
device
W ack
0W data
INTMSK
ack
(5)
(5)
1W data
FRQSETMSB
ack
FRQSETLSB
2W data
ack
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