ZLF645S2864GP0001 Maxim Integrated, ZLF645S2864GP0001 Datasheet - Page 142
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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Clock
19-4572; Rev 0; 4/09
ZLF645 MCUs on-chip oscillator has a high-gain, parallel-resonant amplifier for
connecting to a crystal, ceramic resonator, or any suitable external clock source
(XTAL1 = Input, XTAL2 = Output).
Crystal Specification
The crystal must be AT cut, 1 MHz to 8 MHz (maximum), with a series resistance (RS)
less than or equal to 100
clock source.
The crystal must be connected across XTAL1 and XTAL2 pins using the recommended
capacitors from each pin to ground. The typical capacitor value is 10 pF for 8 MHz. Check
with the crystal supplier for the optimum capacitance.
Maxim’s IR MCU supports crystal, resonator, and oscillator. Most resonators have a
frequency tolerance of less than ±0.5%, which is enough for a remote control application.
Resonator has a very fast startup time, which is around few hundred microseconds. Most
crystals have a frequency tolerance of less than 50 ppm (±0.005%). However, crystal
needs longer startup time than the resonator. The large loading capacitance slows down the
oscillation startup time. Clock oscillation must be stable before the CPU begins instruction
execution. If oscillation is not present or not stable before the chip completes timeout of its
Power-On Reset (POR) period, the chip’s behavior could be indeterminate.
C1
C2
Ceramic Resonator or Crystal
C1, C2 = 10 pF *
f = 8 MHz
*Note: preliminary value, including pin parasitics.
XTAL1
XTAL2
Figure 41. Oscillator Configuration
. The on-chip oscillator can be driven with a suitable external
External Clock
XTAL1
XTAL2
ZLF645 Series Flash MCUs
Ceramic Resonator f = 8 MHz
Product Specification
XTAL1
XTAL2
Clock
134
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