TC3567CFSG-002

2018-04-06

14

3.2. Boot Sequence

The boot sequence of TC3567C is as shown below.

Depending on the pin state of GPIO1 at the time of reset release, it can be used to switch between User-App mode and HCI mode.

Figure 3-2 Boot Sequence of TC3567C

Reset release

GPIO1 check

Begin of firmware boot-up

Toshiba

Test mode

L

H: User-App mode

Load User-App

from NVM

to TC3567C RAM

Check word check

Read "Check Word"

in NVM

Checksum check

Start User-App

NG

OK

OK

NG

Error

(Hardware reset is required

to recovery.)

SWDIO check

GPIO2 check

L: Test mode

H: HCI mode

Reserved

mode

HCI mode

(UART)

H

L

See Flash-ROM(NVM) control section in

Programming Guide for detail