CC1010-RTY1 datasheet(41/152 Pages) TI

41 / 152 page

CC1010

SWRS047

Page 41 of 152

126

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238

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255

0x7FFF

0x7E00

0x7C00

0x7800

0x7000

0x6000

0x4000

0x0000

Page 0 is locked when BBLOCK is cleared

Figure 6. Flash Lock Bits illustration

15.12.9 Read Lock Bits

The lock bits described in the previous

section can be read through the SPI

interface by using the Read Lock Bits

instruction. The instruction will return the 8

lock bits in byte 4 of the instruction.

Wait at least 9

⋅ TXOSC between the last

negative transition on SCK for byte 3

before issuing the first positive edge on

SCK for byte 4 to receive valid data, as

with

the

Read

Program

Memory

instruction.

The lock bits can only be read through the

SPI interface, and not from the 8051 core.

15.12.10 Read Signature Byte

A 6 byte chip signature can be read

through the SPI interface using the Read

Signature Byte instruction. The 3 bit

signature byte address is issued, and the

value is then returned as byte 4.

Signature

byte address

Value

Meaing

000

0x7F

001

0x7F

010

0x7F

011

0x9E

JEDEC manufacturer

ID, identifies Chipcon

AS as the

manufacturer.

100

0x95

Identifies 32 kBytes

of Flash memory

101

0x00

Identifies

CC1010

Table 19. Signature Bytes

Wait at least 9

⋅ TXOSC between the last

negative transition on SCK for byte 3

before issuing the first positive edge on

SCK for byte 4 to receive valid data, as

with

the

Read

Program

Memory

instruction.

15.12.11 SPI Flash Programming

Initialisation

CC1010 must be set into the Flash

programming mode to allow SPI Flash

operations. This is done as follows:

•

Apply power between all DVDD and

DGND pins.

•

Hold PROG low.

•

If a crystal is connected between

XOSC_Q1 and XOSC_Q2, hold RESET

low and wait for the oscillator to start

up. Crystal oscillator start-up times are

given in Table 10. Release RESET

and wait at least 4 crystal oscillator

periods.

•

If a crystal is not connected between

XOSC_Q1 and XOSC_Q2, hold RESET

low and apply a clock signal to

XOSC_Q1. Release RESET after at

least 3 clock periods, and then wait at

least 4 clock periods.

•

Execute the Programming Enable

instruction to complete the SPI Flash

programming Initialisation.

CC1010 is now ready to be programmed, as

described in the next section.

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