TC9496AF Datasheet, PDF (33/48 Pages) Toshiba Semiconductor – 1 Chip Audio Digital Signal Processor

4. Self-Boot Function Description
TC9496AF
4.1 Self-Boot Function
The TC9496AF supports a self-boot function for setting coefficients and offsets.
As Figure 1 shows, the data are set via the microcontroller interface circuit.
First saving the data to be set via the microcontroller in the self-boot ROM (SBROM) allows various
modes to be set later. The microcontroller interface circuit supports two format: I²C and the original
mode. However, the boot must be executed in Standard Transmission.
All the command inputs from the exterior are disregarded during a boot term.
RESET
BOOT
BA1
BA0
Self-boot circuit
SBROM
(1024 word
´ 18 bit)
Timing
gener
-ator
BTCSN
BTIFCK
BTIFDI
BTMODE
Microcontroller interface circuit
10
Internal
CSN
10
Internal
IFCK
10
Internal
IFDI
Internal
I2CS
Figure 1 Self-Boot System
CS
IFCK
IFDI
I2CS
33
2002-01-11