ZLF645S2864GP0001 Maxim Integrated, ZLF645S2864GP0001 Datasheet - Page 31
![no-image](/images/no-image-200.jpg)
ZLF645S2864GP0001
Manufacturer Part Number
ZLF645S2864GP0001
Description
8-bit Microcontrollers - MCU Crimzon Flash Infrared MCU
Manufacturer
Maxim Integrated
Datasheet
1.ZLF645E0H4864G2204.pdf
(201 pages)
Specifications of ZLF645S2864GP0001
Core
Z8
Data Bus Width
8 bit
Maximum Clock Frequency
8 MHz
Program Memory Size
64 KB
Data Ram Size
1 KB
Operating Supply Voltage
2 V to 3.6 V
Interface Type
UART
Number Of Programmable I/os
5
Number Of Timers
2 x 8 bit, 1 x 16 bit
Processor Series
ZLF645
Program Memory Type
Flash
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ZLF645 Series Flash MCUs
Product Specification
23
Port 3
Port 3 is an 8-bit CMOS-compatible I/O port. Port 3 consists of four fixed inputs
(P33:P30), three fixed outputs (P37:P36:P35), and one multi-functioned pin (P34) that can
function as an output only or as a bidirectional open-drain I/O depending on whether the
ZLF645 MCU is in ICP mode.
P30, P31, P32, and P33 are standard CMOS inputs with option enabled pull-up transistors
and can be configured under software as interrupts, as received data input to the UART
block, as input to comparator circuits, or as input to the IR learning amplifier.
P37, P36, and P35 are push/pull outputs and can be configured as outputs from
counter/timers and/or comparator circuits.
During the ZLF645’s POR time, P34 is configured as an input pin with pull-up enabled. If
after completing it’s POR period, the ZLF645 has not detected this pin LOW and been put
into ICP mode, this pin will revert back to being a push/pull output only. For more details
on the function of pin P34, see
ICP Interface
on page 53.
PS026408-1208
Port 3
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