Datasheet

CY8C21634, CY8C21534, CY8C21434

CY8C21334, CY8C21234

Document Number: 38-12025 Rev. AB Page 15 of 53

This chapter lists the registers of the CY8C21x34 PSoC device. For detailed register information, see the PSoC Technical Reference

Manual.

The register conventions specific to this section are listed in Ta b le 2.

The PSoC device has a total register address space of 512 bytes. The register space is referred to as I/O space and is divided into

two banks, Bank 0 and Bank 1. The XOI bit in the Flag register (CPU_F) determines which bank the user is currently in. When the

XOI bit is set to 1, the user is in Bank 1.

Note In the following register mapping tables, blank fields are reserved and must not be accessed.

Table 2. Register Conventions

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