CY7C63231A-PXC Cypress Semiconductor Corp, CY7C63231A-PXC Datasheet - Page 2

• Manufacturer Part Number: CY7C63231A-PXC
• Description: IC MCU 3K USB LS PERIPH 18-DIP
• Manufacturer: Cypress Semiconductor Corp
• Series: enCoRe™r

Specifications of CY7C63231A-PXC

• Applications: USB Microcontroller
• Core Processor: M8B
• Program Memory Type: OTP (3 kB)
• Controller Series: CY7C632xx
• Ram Size: 96 x 8
• Interface: USB
• Number Of I /o: 10
• Voltage - Supply: 3.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 18-DIP (0.300", 7.62mm)
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Processor Series: CY7C63xx
• Core: M8B
• Data Bus Width: 16 bit
• Program Memory Size: 3 KB
• Data Ram Size: 96 B
• Interface Type: PS2, USB
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 10
• Number Of Timers: 1
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant

Functional Overview
enCoRe USB - The New USB Standard
Cypress has reinvented its leadership position in the low-speed
USB market with a new family of innovative microcontrollers.
Introducing...enCoRe™ USB—“enhanced Component
Reduction.” Cypress has leveraged its design expertise in USB
solutions to create a new family of low-speed USB microcon-
trollers that enables peripheral developers to design new
products with a minimum number of components. At the heart of
the Cypress enCoRe USB technology is the breakthrough
design of a crystal-less oscillator. By integrating the oscillator into
the chip, an external crystal or resonator is no longer needed.
We have also integrated other external components commonly
found in low-speed USB applications such as pull-up resistors,
wake-up circuitry, and a 3.3V regulator. All of this adds up to a
lower system cost.
The family is comprised of 8-bit RISC One Time Programmable
(OTP) microcontrollers. The instruction set has been optimized
specifically for USB and PS/2 operations, although the microcon-
trollers can be used for a variety of other embedded applications.
The features up to 10 general-purpose I/O (GPIO) pins to
support USB, PS/2 and other applications. The I/O pins are
grouped into two ports (Port 0 to 1) where each pin can be
individually configured as inputs with internal pull-ups, open
drain outputs, or traditional CMOS outputs with programmable
drive strength of up to 50 mA output drive. Additionally, each I/O
pin can be used to generate a GPIO interrupt to the microcon-
troller.
The microcontrollers feature an internal oscillator. With the
presence of USB traffic, the internal oscillator can be set to
precisely tune to USB timing requirements (6 MHz ±1.5%). This
clock generator has been optimized to reduce clock-related
noise emissions (EMI), and provides the 6-MHz and 12-MHz
clocks that remain internal to the microcontroller. When using the
internal oscillator, XTALIN and XTALOUT can be configured as
additional input pins that can be read on port 2. Optionally, an
external 6-MHz ceramic resonator can be used to provide a
higher precision reference if needed.
The is offered with 3 Kbytes of EPROM to minimize cost, and
has 96 bytes of data RAM for stack space, user variables, and
USB endpoint FIFOs.
Document #: 38-08028 Rev. *D
The family includes low-voltage reset logic, a watchdog timer, a
vectored interrupt controller, and a 12-bit free-running timer. The
low-voltage reset (LVR) logic detects when power is applied to
the device, resets the logic to a known state, and begins
executing instructions at EPROM address 0x0000. LVR will also
reset the part when V
range. The watchdog timer can be used to ensure the firmware
never gets stalled for more than approximately 8 ms.
The microcontroller supports 7 maskable interrupts in the
vectored interrupt controller. Interrupt sources include the USB
Bus-Reset, the 128-μs and 1.024-ms outputs from the
free-running timer, two USB endpoints, an internal wake-up timer
and the GPIO port. The timers bits cause periodic interrupts
when enabled. The USB endpoints interrupt after USB transac-
tions complete on the bus. The GPIO port has a level of masking
to select which GPIO inputs can cause a GPIO interrupt. For
additional flexibility, the input transition polarity that causes an
interrupt is programmable for each GPIO pin. The interrupt
polarity can be either rising or falling edge.
The free-running 12-bit timer clocked at 1 MHz provides two
interrupt sources as noted above (128 μs and 1.024 ms). The
timer can be used to measure the duration of an event under
firmware control by reading the timer at the start and end of an
event, and subtracting the two values.
The CY7C63221/31A includes an integrated USB serial
interface engine (SIE). The hardware supports one USB device
address with two endpoints. The SIE allows the USB host to
communicate with the function integrated into the microcon-
troller. A 3.3V regulated output pin provides a pull-up source for
the external USB resistor on the D– pin. When using an external
voltage regulator VREG can be configured as an input pin that
can be read on port 2 (P2.0).
The USB D+ and D– USB pins can alternately be used as PS/2
SCLK and SDATA signals, so that products can be designed to
respond to either USB or PS/2 modes of operation. PS/2
operation is supported with internal pull-up resistors on SCLK
and SDATA, the ability to disable the regulator output pin, and an
interrupt to signal the start of PS/2 activity. No external compo-
nents are necessary for dual USB and PS/2 systems, and no
GPIO pins need to be dedicated to switching between modes.
Slow edge rates operate in both modes to reduce EMI.
CC
drops below the operating voltage
CY7C63221/31A
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