E0C63P466
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Operating Mode
Three operating modes are available in the E0C63P466: one is for normal operation and the others are for
programming.
The operating mode is decided by the terminal settings at power-on or initial reset.
When the SPRG terminal is set to Low, the E0C63P466 enters Serial Programming mode. To operate the
E0C63P466 in Normal Operation mode (to execute the instruction written to the Flash EEPROM after program-
ming), the SPRG terminal should be set to High or open.
The parallel programming including the mode switching and terminal settings is controlled by the exclusive
PROM writer.
The following table lists the operating modes.
Operating mode
Normal Operation mode
Serial Programming mode
Parallel Programming mode
SPRG terminal
High or open
Low
Set by the PROM writer
Normal Operation Mode
In this mode, the E0C63000 core CPU and the peripheral circuits operate by the instructions programmed in the
Flash EEPROM. The Flash EEPROM bit data is set to "1" at shipment.
In Normal Operation mode, set the terminals for programming the Flash EEPROM as below. The board must be
designed so that the terminal settings cannot be changed while the IC is operating.
Terminal
V
DDF
SPRG
SCLK
RXD
TXD
CLKIN
RSTOUT
VEPEXT
Set-up
Supply the same voltage as V
DD
High or open
High or open
High or open
Open
High or open
Open
Open
Serial Programming Mode
Serial Programming mode writes data to the Flash EEPROM using a serial communication between the exclu-
sive PROM writer (UNIVERSAL ROM WRITER II) and the E0C63P466. By providing a serial communication port
on the target board, the E0C63P466 on the board can be programmed (on-board writing).
Terminal
V
DDF
SPRG
SCLK
RXD
TXD
CLKIN
RSTOUT
VEPEXT
Set-up
Supply the same voltage as V
DD
Low
Connected to the PROM writer
Connected to the PROM writer
Connected to the PROM writer
Connected to the PROM writer
Open
Open
When the SPRG terminal is set to Low, the E0C63P466 starts operating in Serial Programming mode after
power-on or an initial reset.
Be sure not to change the SPRG terminal status during normal operation or serial programming, because the
operating mode may change according to the terminal status.
The serial programming is performed using the 1MHz clock supplied from the PROM writer to the CLKIN termi-
nal. Take noise measure into consideration so that noise does not affect the clock line input to the CLKIN terminal
when designing the target board.
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SEIKO [ SEIKO EPSON CORPORATION ]
