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CHAPTER 24 EXAMPLE OF F
24.1
Standard Configuration for Serial On-board Writing
(Fujitsu Standard)
MB90F462/F462A/F463A supports serial on-board writing (Fujitsu standard) to flash
ROM. This describes the specifications for serial on-board writing.
■ Standard Configuration for Fujitsu Standard Serial On-board Writing
The AF200 flash microcontroller programmer of Yokogawa Digital Computer Co., Ltd. is used for
Fujitsu standard serial on-board writing.
Note:
Contact Yokogawa Digital Computer Co., Ltd. for the functionality and operation of the AF200 flash
microcontroller programmer and information on the general-purpose common cable (AZ210) and
connectors.
Table 24.1-1 Pins used for Fujitsu Standard Serial On-board Writing
Pin
MD2, MD1, MD0
Mode pin
X0, X1
Oscillator pin
P00, P01
Write program start pin
RSTX
Reset pin
SIN0
Serial data input pin
SOT0
Serial data output pin
SCK0
Serial clock input pin
C
C pin
VCC
Power supply pin
VSS
Ground pin
616
2
MC-16LX MB90F462/F462A/F463A CONNECTION FOR SERIAL WRITING
Host interface cable (AZ201)
AF200
flash
microcontroller
RS232C
programmer
+
memory card
Function
Used to enable write mode for the flash microcomputer programmer.
In write mode, since the operation clock is one times the CPU clock, the
oscillation clock frequency is the internal operation clock.
The resonator used for serial rewriting is therefore 1 MHz to 16 MHz.
UART0 is used in CLK synchronous mode.
Capacitance pin for power stabilization. Connect a ceramic capacitor
of about 0.1
Write voltage (5 V ± 10%)
Used also as the ground pin for the flash microcontroller programmer.
General-purpose common cable (AZ210)
Clock
MB90F462/F462A/F463A
synchronous
user system
serial
Operable in stand-alone mode
Description
–
–
µ
F to the outside.
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