ZLP128ICE01ZEM Zilog, ZLP128ICE01ZEM Datasheet - Page 49

• Manufacturer Part Number: ZLP128ICE01ZEM
• Description: EMULATOR CRIMZON Z8 ZLP12840
• Manufacturer: Zilog

Specifications of ZLP128ICE01ZEM

• Interface Type: RS-232, Ethernet, USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3829

Infrared Learning Amplifier
PS024410-0108
The ZLP12840 MCU’s infrared learning amplifier allows you to detect and decode infra-
red transmissions directly from the output of the receiving diode without the need for
external circuitry. See
An IR diode can be connected to the IR amplifier as displayed in
amplifier is enabled and an input current is detected on Port 3, pin 1 (P31), the IR
amplifier outputs a logical High value. When the input current is below the switching
threshold of the IR amplifier, the amplifier outputs a logical Low value.
Within the MCU, the IR amplifier output goes to the capture/timer logic, which can be
programmed to demodulate the IR signal. The IR amplifier output can also be read by the
CPU, or drive the Port 3, pin 4 (P34) output if write-only register bit PCON[0] is written
with a 1.
The IR learning amplifier can demodulate signals up to a frequency of 500 kHz. A special
mode exists that allows you to capture the third, fourth, and fifth edges of the IR amplifier
output and generate an interrupt.
For details on programming the timers to demodulate a received signal, see
page 59.
Figure 12. Learning Amplification Circuitry with the ZLP12840 MCU
Port 3
P R E L I M I N A R Y
on page 14.
V
CC
D1
Photodiode
P31 of MCU
Product Specification
Figure
Infrared Learning Amplifier
ZLP12840 OTP MCU
12. When the IR
Timers
on
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