ZLR32300 Datasheet, PDF (45/98 Pages) Zilog, Inc. – Z8 Low-Voltage ROM MCU with Infrared Timers

Crimzon^TM ZLR32300
Product Specification
37
Table 15. CTR3 (D)03H: T8/T16 Control Register (Continued)
Field
Bit Position
Value
Reserved
---43210
R
1
W
x
Note: *Indicates the value upon Power-On Reset.
**Indicates the value upon Power-On Reset. Not reset with a Stop Mode recovery.
Description
Always reads 11111
No Effect
Counter/Timer Functional Blocks
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 17).
P31
MUX
P20
CTR1
D5,D4
Glitch
Filter
Edge
Detector
Pos
Edge
Neg
Edge
CTR1
D6
CTR1
D3, D2
Figure 17. Glitch Filter Circuitry
T8 Transmit Mode
Before T8 is enabled, the output of T8 depends on CTR1, D1. If it is 0, T8_OUT is
1; if it is 1, T8_OUT is 0. See Figure 18.
PS022607-1205
Functional Description