MAXQ7667AACM/V+ Maxim Integrated Products, MAXQ7667AACM/V+ Datasheet - Page 21

• Manufacturer Part Number: MAXQ7667AACM/V+
• Description: IC MCU-BASED DAS 16BIT 48-LQFP
• Manufacturer: Maxim Integrated Products
• Series: MAXQ™r

Specifications of MAXQ7667AACM/V+

• Core Processor: RISC
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 16
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Ram Size: 2K x 16
• Voltage - Supply (vcc/vdd): 2.25 V ~ 2.75 V
• Data Converters: A/D 5x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-LQFP
• Processor Series: MAXQ7667
• Core: RISC
• Data Bus Width: 16 bit
• Data Ram Size: 4 KB
• Interface Type: UART, JTAG, LIN
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 3
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: MAXQ7667EVKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 5 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

The MAXQ7667 includes three 16-bit timers/counters
with programmable I/O (Figure 9). Each timer is a Type
2 timer implemented in the MAXQ
timer is an autoreload 16-bit timer/counter offering the
following functions:
The MAXQ7667 oscillator module supplies the system
clock for the µC core and all of the peripheral modules.
The high-frequency oscillator operates with a 1MHz to
16MHz crystal. Use the internal RC oscillator as the
system clock for applications that do not require pre-
cise timing. See Section 15 of the MAXQ7667 User’s
Guide .
The MAXQ7667 supports the following master clock
sources:
MAXQ is a registered trademark of Maxim Integrated Products, Inc.
• 8-bit/16-bit timer/counter
• Up/down autoreload
• Counter function of external pulse
• Capture
• Compare
• Internal high-frequency oscillator drives an exter-
nal 1MHz–16MHz crystal or ceramic resonator
______________________________________________________________________________________
Ultrasonic Distance-Measuring System
Type 2 Timers/Counters
16-Bit, RISC, Microcontroller-Based,
®
family. The Type 2
Clock Sources
The MAXQ7667 requires a crystal with the following
specifications:
Frequency: 1MHz–16MHz
C
Drive level: 5µW
Series resonance resistance: 30Ω (max)
Note: Quartz crystal vendors often specify series reso-
nance resistance (R1). Series resonance resistance is
the resistance observed when the resonator is in the
series resonant condition. When a resonator is used in
the parallel resonant mode with an external load capac-
itance, as is the case with the MAXQ7667 oscillator cir-
cuit, the effective resistance at the loaded frequency of
oscillation is:
For typical shunt capacitance (CO) and load capaci-
tance (C
tially exceeds R1 by a factor of 2.
LOAD
• Internal, fast-starting, 13.5MHz RC oscillator
• External 4MHz–16MHz clock input
(default oscillator at startup and in the event the
external crystal fails)
: 6pF (min)
LOAD
) values, the effective resistance poten-
R1 x (1 + (CO/C
LOAD
))
Crystal Selection
2
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