Chapter 26 Examples Of Mb90F428/A Serial Write Connection; Basic Configuration Of Mb90F428/A Serial Write Connection; Table 26-1 Pins Used For Fujitsu Standard Serial Onboard Writing - Fujitsu MB90420/5 (A) Series Hardware Manual

This chapter gives examples of MB90F428/A serial write connection.

26.1 Basic Configuration of MB90F428/A Serial Write Connection

The MB90F428/A supports flash ROM serial onboard writing (Fujitsu standard). This section describes the
specifications.
n Basic configuration
The flash microcontroller programmer from Yokogawa Digital Computer Ltd. is used for Fujitsu standard
serial onboard writing.
Host interface cable (AZ201)
Note: Inquire of Yokogawa Digital Computer Ltd. for details about the functions and operations of the
AF220/AF210/AF110 flash microcontroller programmer, general-purpose common cable for con-
nection (AZ210), and connectors.

Table 26-1 Pins Used for Fujitsu Standard Serial Onboard Writing

Pin
MD2, MD1, MD0 Mode pins
X0, X1 Oscillation pins
P00, P01 Write program activation pins
RSTX Reset pin
SIN1 Serial data input pin
SOT1 Serial data output pin
SCK1 Serial clock input pin
C C pin
V Supply voltage pin
CC
V GND pin
SS
EXAMPLES OF MB90F428/A SERIAL WRITE CONNECTION
Flash
RS232C
microcontroller
programmer +
memory card
Stand-alone operation enabled
Function
General-purpse
common cable (AZ210)
CLK synchronous serial
Additional Information
Controls write mode from the flash microcontroller programmer
In write mode, the CPU internal operation clock signal is one
multiple of the PLL clock signal frequency. Therefore, because
the oscillation clock frequency becomes the internal operation
clock signal, the oscillator used for serial rewriting is 1 MHz to
16 MHz.
UART1 is used as CLK synchronous mode.
This external capacitor pin is used to stabilize the power
supply. Connect a ceramic capacitor of approximately 0.1 µF
to the outside.
If the write voltage (5 V ±10%) is supplied
Supply voltage pin
from the user system, the flash microcontroller programmer
need not be connected. Connect so that the power supply of
the user side is not short-circuited.
GND pin is common to the ground of the flash microcontroller
programmer.
26-3
MB90F428/A
user system
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