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MB90335 Series
■ Pins Used for Fujitsu Standard Serial On-Board Programming
Table 23.1-1 shows the function of pins used for Fujitsu standard serial on-board programming.
Table 23.1-1 Function of Used Pins
Pin
MD2,MD1,MD0
X0,X1
Oscillation pins
Writing program
P60,P61
activating pins
RST
SIN0
Serial data input
SOT0
Serial data output
SCK0
Serial clock input
V
Supply voltage
CC
V
SS
AF220/AF210/AF120/AF110
AF220/AF210/AF120/AF110
Notes:
•
When the P60, P61, SIN0, SOT0, or SCK0 pin is used also in a user system, the control circuit
shown in Figure 23.1-2 is required.
•
During serial write, the user circuit can be disconnected using the /TICS signal from the flash
microcontroller programmer. Please refer to "23.4 Example of Connecting Serial Writing".
CM44-10137-6E
Function
Setting MD2=1, MD1=1, and MD0=0 allows the mode to be in the serial write
Mode Pins
mode.
Because the internal CPU operation clock is set to be the 1 multiplication PLL
clock in the serial write mode, the internal operation clock frequency is the same
as the oscillation clock frequency. When you perform the serial write, the
frequency you can input into the high-speed oscillation input pin is fixed to 6
MHz.
Input a "L" level to P60 and a "H" level to P61.
Reset
UART0 is used as CLK synchronous mode.
Supply the write voltage (V
GND
GND pin is common to the ground of the flash microcontroller programmer.
Figure 23.1-2 Pin Control Circuit
Write control pin
/TICS pin
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 23 EXAMPLE of CONNECTING SERIAL WRITING
Supplementary Information
=3.13 V to 3.6 V)
CC
10 kΩ
User
23.1 Basic Configuration
-
MB90F337
Write control pin
515
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