Cypress CY8C24123A Register Reference

CY8C24123A

CY8C24223A, CY8C24423A

Document Number: 38-12028 Rev. *I Page 14 of 56

Register Reference

This section lists the registers of the CY8C24x23A PSoC device.

For detailed register information, refer the PSoC Programmable

Sytem-on-Chip Reference Manual.

Register Conventions

Abbreviations Used

The register conventions specific to this section are listed in the

following table.

Register Mapping Tables

The PSoC device has a total register address space of 512

bytes. The register space is referred to as IO space and is

divided into two banks. The XOI bit in the Flag register (CPU_F)

determines which bank the user is currently in. When the XOI bit

is set the user is in Bank 1.

Note In the following register mapping tables, blank fields are

reserved and must not be accessed.

Table 8. Abbreviations

Convention Description

R Read register or bit(s)

W Write register or bit(s)

L Logical register or bit(s)

C Clearable register or bit(s)

# Access is bit specific

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Contents

Main CY8C24123A PSoC Programmable System-on-Chip Features Logic Block Diagram CY8C24123A CY8C24223A, CY8C24423A PSoC Functional Overview PSoC Core Digital System CY8C24123A CY8C24223A, CY8C24423A Analog System CY8C24123A CY8C24223A, CY8C24423A Additional System Resources PSoC Device Characteristics Getting Started Development Kits Development Tools PSoC Designer Software Subsystems PSoC Designer Core Engine PSoC Designer Hardware Tools Designing with User Modules Application Editor Debugger Device Editor Document Conventions Acronyms Used Units of Measure Numeric Naming CY8C24123A CY8C24223A, CY8C24423A Pinouts 8-Pin Part Pinoutt PDIP SOIC 20-Pin Part Pinout PDIP SSOP SOIC 28-Pin Part Pinout PDIP SSOP SOIC 32-Pin Part Pinout CY8C24123A 56-Pin Part Pinout Page Register Reference Register Conventions Register Mapping Tables Table 9. Register Map Bank 0 Table: User Space Table 9. Register Map Bank 0 Table: User Space (continued) Table 10. Register Map Bank 1 Table: Configuration Space Table 10. Register Map Bank 1 Table: Configuration Space (continued) Electrical Specifications Absolute Maximum Ratings Operating Temperature DC Electrical Characteristics Page CY8C24223A, CY8C24423A Page CY8C24123A CY8C24223A, CY8C24423A Page Page +PSoC Page Page Page Page AC Electrical Characteristics Page Figure 14. PLL Lock Timing Diagram Figure 15. PLL Lock for Low Gain Setting Timing Diagram Figure 16. External Crystal Oscillator Startup Timing Diagram Figure 17. 24 MHz Period Jitter (IMO) Timing Diagram Figure 18. 32 kHz Period Jitter (ECO) Timing Diagram Page Page Page 0 0.01 0.1 1.0 10 Page Page CY8C24123A Page Page CY8C24223A, CY8C24423A SDA SCL SSr SP T T T T T T Packaging Information Packaging Dimensions Figure 23. 8-Pin (300-Mil) PDIP DIMENSIONS IN INCHES MIN. MAX. 51-85075 *A Figure 24. 8-Pin (150-Mil) SOIC Figure 25. 20-Pin (300-Mil) Molded DIP 51-85011-A 51-85066 *C 20-Lead(300-Mil) Molded DIP P5 Page Page Figure 30. 28-Pin (300-Mil) Molded SOIC Figure 31. 32-Pin (5x5 mm) QFN EXPOSED PAD LF32 Page Thermal Impedances Capacitance on Crystal Pins Solder Reflow Peak Temperature Development Tool Selection Software Development Kits Evaluation Tools Device Programmers Accessories (Emulation and Programming) Third Party Tools Build a PSoC Emulator into Your Board Ordering Information Ordering Code Definitions CY 8 C 24 xxx-SPxx Document History Page Sales, Solutions, and Legal Information Worldwide Sales and Design Support Products PSoC Solutions