E0C63P466
■ PROM PROGRAMMING AND OPERATING MODE
The E0C63P466 has built-in Flash EEPROMs as the instruction ROM and the data ROM that allow the developer
to program the ROM data using the exclusive PROM writer (UNIVERSAL ROM WRITER II). This section ex-
plains the PROM programmer that controls data writing and the writing mode.
■ Configuration of PROM Programmer
The configuration of the PROM programmer is shown below.
VDDF
VSS
PROM programmer
RXD
TXD
SCLK
CLKIN
Serial interface
controller
Instruction
PROM
From/to
exclusive
PROM writer
Address
Data
Parallel interface
controller
Control signal
Data
PROM
Programming
control circuit
SPRG
PROM block
The PROM programmer supports the following two writing modes.
1) Serial Programming
2) Parallel Programming (Only QFP17-144pin)
Serial Programming mode uses the serial communication ports of the PROM writer and E0C63P466 to write
data. This mode enables on-board programming by designing the target board with a serial writing function. In
Parallel Programming mode, the on-chip Flash ROM can be directly programmed using the exclusive PROM
writer with the adaptor socket installed. Refer to "Operating Mode" for each programming method.
Terminals
The E0C63P466 provides the following terminals for programming the Flash EEPROM.
VDDF
Power supply (+) terminal for Flash EEPROM
SPRG
Flash programming control terminal (pull-up resistor built-in)
When set to High Normal operation mode (The CPU executes the program in the Flash EEPROM.)
When set to Low Programming mode (for writing data to the Flash EEPROM)
Serial transfer clock input/output terminal for Serial Programming (pull-up resistor built-in)
Serial data input terminal for Serial Programming (pull-up resistor built-in)
Serial data output terminal for Serial Programming
SCLK
RXD
TXD
CLKIN
PROM programmer clock input terminal (1MHz; pull-up resistor built-in)
RSTOUT Test signal monitor terminal (Not used when writing; keep it open)
VEPEXT Test signal monitor terminal (Not used when writing; keep it open)
The eight terminals above are provided exclusively for the Flash EEPROM. The E0C63454, E0C63458 and
E0C63466 do not have these terminals.
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SEIKO [ SEIKO EPSON CORPORATION ]
