z86e72 ZiLOG Semiconductor, z86e72 Datasheet - Page 57

• Manufacturer Part Number: z86e72
• Description: Otp Microcontroller
• Manufacturer: ZiLOG Semiconductor

PS008704-0507
Counter/Timer Functional Blocks
The following are the counter/timer functional blocks:
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Input Circuit
The edge detector monitors the input signal on P31 or P20. Based on CTR1 D5–
D4, a pulse is generated at the Pos Edge or Neg Edge line when an edge is
detected. Glitches in the input signal that have a width less than specified (CTR1
D3, D2) are filtered out (see Figure 25).
CTR1 D6
P20
P31
Input circuit
Eight-bit counter/timer circuits (page 54)
Sixteen-bit counter/timer circuits (page 59)
Output circuit (page 62)
CTR1 D3, D2
MUX
Figure 25. Glitch Filter Circuitry
Glitch Filter
CTR1 D5, D4
Edge Detector
OTP Microcontroller
Neg Edge
Pos Edge
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