TC9496AF Datasheet, PDF (36/48 Pages) Toshiba Semiconductor – 1 Chip Audio Digital Signal Processor

TC9496AF
4.3.2 Self-Boot Operation when Setting Microcontroller
In this mode, the microcontoroller can specify any address and the boot operation starts from that
address.
The BOOT pin can be set to either High or Low. Setting the self-boot ROM start address using the
BOOT command (command: 41h) from the microcontroller starts the boot operation with no wait. The
boot operation when set from the microcontroler is the same as the self-boot operation at reset except
that the boot operation can start from any address.
/RST
Boot wait period
2048 fs
Boot time
1024 fs (max)
FS
BOOT
BTMODE
(internal signal)
BA [1:0]
Fixed to “H”
2
BootRom Adrs
2
10 11 12 13 14 15 16
3FF
Rom Dt [17:16]
JMP
CMD DT DT DE CMD DE CMD
JMP JMP
BTCSN
BTIFCK
BTIFDI
CDDDCDC
8 clock
DT: Data
DE: DataEnd
C
Figure 3 Boot Timing Chart (at reset)
Table 3 Differences Depending on Operation Mode
Parameter
Boot Wait Period
Boot Start Address
BOOT pin
RESET Pin or Initialized Command
Yes
Select from 000h to 003h with BA0 and BA1
terminal
“H” Level
BOOT Command
No
Any address specified from microcontroller
Any (don’t care)
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2002-01-11