Fujitsu MB90480 Series Hardware Manual page 533

CHAPTER 24 EXAMPLES OF MB90F481B/MB90F482B/MB90F488B/MB90F489B SERIAL PROGRAMMING
Similarly to P80, using the SIN0, SOT0, and SCK0 pins in the user system requires a control
circuit as shown in Figure 24.2-2. The user circuit is disconnected in serial programming mode
by the flash microcontroller programmer's "/TICS" signal.
AF220/AF210/AF120/AF110
AF220/AF210/AF120/AF110
Connect to AF220/AF210/AF120/AF110 when the power supply of the user system is turned off.
Figure 24.2-2 Pin control circuit
Write control pin
4.7 kΩ
/TICS pin
MB90F481B, MB90F482B,
MB90F488B, MB90F489B
Write control pin
User
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