CY8C21634, CY8C21534

CY8C21434, CY8C21334, CY8C21234

Table 37. AC Programming Specifications (continued)

Symbol

Description

Min

Typ

Max

Units

 

Notes

TWRITE

Flash Block Write Time

–

30

–

ms

 

 

TDSCLK

Data Out Delay from Falling Edge of SCLK

–

–

45

ns

3.6

< Vdd

TDSCLK3

Data Out Delay from Falling Edge of SCLK

–

–

50

ns

3.0

≤ Vdd ≤ 3.6

TDSCLK2

Data Out Delay from Falling Edge of SCLK

–

–

70

ns

2.4

≤ Vdd ≤ 3.0

AC I2C Specifications

The following tables list the guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V and -40°C ≤ TA ≤ 85°C, 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, or 2.4V to 3.0V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters apply to 5V, 3.3V, or 2.7V at 25°C and are for design guidance only.

Table 38. AC Characteristics of the I2C SDA and SCL Pins for Vdd ≥ 3.0V

Symbol

Description

Standard Mode

Fast Mode

Units

Min

Max

Min

Max

 

 

 

FSCLI2C

SCL Clock Frequency

0

100

0

400

kHz

THDSTAI2C

Hold Time (repeated) START Condition.

4.0

–

0.6

–

μs

 

After this period, the first clock pulse is

 

 

 

 

 

 

generated.

 

 

 

 

 

TLOWI2C

LOW Period of the SCL Clock

4.7

–

1.3

–

μs

THIGHI2C

HIGH Period of the SCL Clock

4.0

–

0.6

–

μs

TSUSTAI2C

Set-up Time for a Repeated START

4.7

–

0.6

–

μs

 

Condition

 

 

 

 

 

THDDATI2C

Data Hold Time

0

–

0

–

μs

TSUDATI2C

Data Set-up Time

250

–

100[21]

–

ns

TSUSTOI2C

Set-up Time for STOP Condition

4.0

–

0.6

–

μs

TBUFI2C

Bus Free Time Between a STOP and START

4.7

–

1.3

–

μs

 

Condition

 

 

 

 

 

TSPI2C

Pulse Width of spikes are suppressed by the

–

–

0

50

ns

 

input filter.

 

 

 

 

 

Note

21.A Fast-Mode I2C-bus device may be used in a Standard-Mode I2C-bus system, but the requirement tSU;DAT ≥ 250 ns must then be met. This is automatically the case if the device does not stretch the LOW period of the SCL signal. If such device does stretch the LOW period of the SCL signal, it must output the next data bit to the SDA line trmax + tSU;DAT = 1000 + 250 = 1250 ns (according to the Standard-Mode I2C-bus specification) before the SCL line is released.

Document Number: 38-12025 Rev. *O

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Cypress CY8C21234, CY8C21334, CY8C21634, CY8C21434, CY8C21534 manual AC I2C Specifications
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CY8C21634, CY8C21534, CY8C21434, CY8C21334, CY8C21234 specifications

The Cypress CY8C21234, CY8C21334, CY8C21434, CY8C21534, and CY8C21634 are members of the PSoC® 1 family of microcontrollers, designed for embedded applications that demand flexibility, integration, and efficiency. These microcontrollers are well-suited for a variety of projects due to their unique characteristics and advanced technologies.

One of the primary features of the PSoC 1 series is the integration of analog and digital components on a single chip. This combination allows for the implementation of complex control algorithms without the need for multiple external components. Each device in this family is equipped with programmable analog blocks capable of interfacing with sensors, as well as digital blocks that facilitate communication with various peripherals.

The CY8C21234 series provides a 16-bit architecture, which enhances performance for processing and control tasks. The microcontrollers boast an operational range of up to 24 MHz, making them suitable for high-speed applications. With up to 16 KB of flash memory, these devices have ample memory for storing program code and user data.

Another key characteristic of the CY8C21234, CY8C21334, CY8C21434, CY8C21534, and CY8C21634 devices is their ease of use. They come with a comprehensive development environment known as PSoC Designer. This software provides a user-friendly interface to configure the device’s hardware resources graphically and allows for seamless integration of custom firmware.

In terms of communication capabilities, these microcontrollers support multiple protocols, including I²C, SPI, and UART, providing versatile interfacing options with other devices. This makes them ideal for applications such as sensor processing, motor control, and portable devices.

Power management is another significant highlight of the PSoC 1 family. The microcontrollers are designed with low-power operation in mind, featuring multiple sleep modes that contribute to extended battery life in portable applications.

Overall, the Cypress CY8C21234, CY8C21334, CY8C21434, CY8C21534, and CY8C21634 microcontrollers are a versatile solution for a wide range of embedded applications, combining programmable analog and digital components, ease of development, and efficient power management in a compact form factor. Their performance and flexibility make them a popular choice among engineers and developers exploring innovative designs.
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