Z86L88 Datasheet, PDF (55/80 Pages) Zilog, Inc. – INFRARED REMOTE CONTROLLERS

Z86L88
Low-Voltage IR Microcontroller
48
it is a negative edge, HI8. From that point, an edge-detect status bits (CTR1 D1,
D0) is set, and an interrupt can be generated if enabled (CTR0 D2). Meanwhile,
T8 is loaded with FFh and starts counting again. If T8 reaches 0, the time-out sta-
tus bit (CTR0 D5) is set, an interrupt can be generated if enabled (CTR0 D1), and
T8 continues counting from FFh (see Figure 36 and Figure 37).
T8 (8-Bit)
Count Capture
T8_Enable
(Set by User)
No
Yes
Edge
No
Present
Yes
Pos
T8 LO8
What Kind
of Edge
Neg
T8 HI8
FFh T8
Figure 36. Demodulation Mode Count Capture Flowchart
19-4614; Rev 0; 4/09