RA8906
Version 2.1
8-Bit Micro-Controller
IN
OUT
OUT
IN
D[7:0]
Data Bus. These pins are used for external system ROM data. Normally, users
will not use these pins.
ROM_CE#
ROM_OE#
TEST_[2:0]
ROM Chip Enable. These pins are used for external system ROM chip enable.
Normally, users will not use these pins.
ROM Output Enable. These pins are used for external system ROM output
enable. Normally, users will not use these pins.
Test Pins. These are for RAiO’s internal testing purpose used in testing IC and
ROM status. Normally, users will not use these pins.
PWR
PWR
VDD, AVDD
GND, AGND
Power Supply Voltage and Analog Power Supply Voltage.
Ground and Analog Ground.
Development
The RA8906 support the ISP(In-System Programming) and ISD(In-System Debugging) functions for customer to
develop their system. Users can download their programs as well as data from a PC host to the embedded
Flash ROM of RA8906.
-ISP/ISD Mode is entered when the MONITOR# pin having been pulled down to ground voltage level. The on-
chip Monitor program together with RAiO’s ICE(RICE) Utility Program running on a PC will be executed to
support ICE debugging and ISP download of user programs from the PC Host.
R A iO IC E
IS P
D ev elo p m en t
S peech Toy
D ev elo p P ro g ra m fro m IS P M o d e
(C u sto m ers)
-User Mode is entered when the MONITOR# pin has been pulled up to logic high voltage level. User application
programs can be executed only in this mode. The end-user can download the application program or data from
the customer’s website through the PC interface. Because the program/data was stored in the flash so the
application device of customer(such as speech toy) will operate independent that after disconnect with the PC.
In te rn e t
w w w .
to y s .c o m
S p e e c h T o y
S p e e c h T o y
D o w n lo a d f r o m I n te r n e t
(E n d -U s e r s )
A
P o r ta b le S p e e c h T o y
5/7
RAiO TECHNOLOGY INC.
www.raio.com.tw
RAIO [ RAIO TECHNOLOGY INC. ]
