ATtiny5 datasheet(105/168 Pages) ATMEL

105 / 168 page

105

8127C–AVR–10/09

ATtiny4/5/9/10

14.7 Control and Status Space Register Descriptions

The control and status registers of the Tiny Programming Interface are mapped in the Control

and Status Space (CSS) of the interface. These registers are not part of the I/O register map

and are accessible via SLDCS and SSTCS instructions, only. The control and status registers

are directly involved in configuration and status monitoring of the TPI.

A summary of CSS registers is shown in Table 14-11.

14.7.1

TPIIR – Tiny Programming Interface Identification Register

• Bits 7:0 – TPIIC: Tiny Programming Interface Identification Code

These bits give the identification code for the Tiny Programming Interface. The code can be

used be the external programmer to identify the TPI. The identification code of the Tiny Pro-

gramming Interface is shown in Table 14-12..

14.7.2

TPIPCR – Tiny Programming Interface Physical Layer Control Register

• Bits 7:3 – Res: Reserved Bits

These bits are reserved and will always read zero.

Table 14-11. Summary of Control and Status Registers

Addr.

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0x0F

TPIIR

Tiny Programming Interface Identification Code

0x0E

...

0x03

Reserved

–

0x02

TPIPCR

–

GT2

GT1

GT0

0x01

Reserved

–

0x00

TPISR

–

NVMEN

–

Bit

765

4321

CSS: 0x0F

Programming Interface Identification Code

TPIIR

Read/Write

RRRR

Initial Value

000

0000

Table 14-12. Identification Code for Tiny Programming Interface

Code

Value

Interface Identification

0x80

Bit

765

4321

CSS: 0x02

–

GT2

GT1

GT0

TPIPCR

Read/Write

RRRR

R/W

Initial Value

000

0000

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