Z86L825 Datasheet, PDF (54/79 Pages) Zilog, Inc. – 20-Pin Low-Voltage IR Microcontrollers

Z86L825/826/827
20-Pin Low-Voltage IR Microcontrollers
47
into LO8; if it is a negative edge, HI8. One of the edge-detect status bits (CTR1
D1, D0) is set, and an interrupt can be generated if enabled (CTR0 D2). Mean-
while, T8 is loaded with FFh and starts counting again. If T8 reaches 0, the time-
out status 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
PS008808-1203
PRELIMINARY