CY7C63231A-PXC Cypress Semiconductor Corp, CY7C63231A-PXC Datasheet - Page 14

• 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

9.0
The chip can be clocked from either the internal on-chip clock, or from an oscillator based on an external resonator/crystal, as
shown in Figure 9-1. No additional capacitance is included on chip at the XTALIN/OUT pins. Operation is controlled by the Clock
Configuration Register, Figure 9-2.
Bit 7: Ext. Clock Resume Delay
Bit [6:4]: Wake-up Timer Adjust Bit [2:0]
Bit 3: Low-voltage Reset Disable
Document #: 38-08028 Rev. *B
Read/Write
Bit Name
External Clock Resume Delay bit selects the delay time when switching to the external oscillator from the internal oscillator
mode, or when waking from suspend mode with the external oscillator enabled.
1 = 4 ms delay.
0 = 128 µs delay.
The delay gives the oscillator time to start up. The shorter time is adequate for operation with ceramic resonators, while the
longer time is preferred for start-up with a crystal. (These times do not include an initial oscillator start-up time which depends
on the resonating element. This time is typically 50–100 µs for ceramic resonators and 1–10 ms for crystals). Note that this
bit only selects the delay time for the external clock mode. When waking from suspend mode with the internal oscillator (Bit 0
is LOW), the delay time is only 8 µs in addition to a delay of approximately 1 µs for the oscillator to start.
The Wake-up Timer Adjust Bits are used to adjust the Wake-up timer period.
If the Wake-up interrupt is enabled in the Global Interrupt Enable Register, the microcontroller will generate wake-up interrupts
periodically. The frequency of these periodical wake-up interrupts is adjusted by setting the Wake-up Timer Adjust Bit [2:0],
as described in Section 11.2. One common use of the wake-up interrupts is to generate periodical wake-up events during
suspend mode to check for changes, such as looking for movement in a mouse, while maintaining a low average power.
When V
microcontroller enters a partial suspend state for a period of t
Reset
Bit #
Clocking
(to Microcontroller)
CC
Clk2x (12 MHz)
Clk1x (6 MHz)
(to USB SIE)
drops below V
Ext. Clock
Resume
Ext Osc Enable
Delay
R/W
7
0
Internal Osc
Int Clk Output Disable
Port 2.1
LVR
R/W
Figure 9-2. Clock Configuration Register (Address 0xF8)
(see Section 23.0 for the value of V
Wake-up Timer Adjust Bit [2:0]
6
0
FOR
FOR
Doubler
Clock
Figure 9-1. Clock Oscillator On-chip Circuit
R/W
5
0
R/W
4
0
START
LVR
Low-voltage
(see Section 24.0 for the value of t
Disable
Port 2.2
Reset
) and the Low-voltage Reset circuit is enabled, the
R/W
3
0
Precision
Clocking
Enable
USB
R/W
2
0
CY7C63221/31A
enCoRe™ USB
Internal
Disable
Output
Clock
R/W
1
0
XTALOUT
XTALIN
START
Page 14 of 50
Oscillator
External
). Program
Enable
R/W
0
0
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