Fujitsu F2MC-16LX Hardware Manual page 518

CHAPTER 27 EXAMPLES OF MB90F474/MB90F476 SERIAL PROGRAMMING CONNECTION
AF220/AF210/AF120/AF110
AF220/AF210/AF120/AF110
Note:
• Using the pins SIN0, SOT0, and SCK0 in the user system requires a control circuit as shown
in Figure 27.4-4 "Pin control circuit" (the user circuit is disconnected in serial programming
mode by the flash microcomputer programmer's "/TICS" signal).
• Connect to AF220/AF210/AF120/AF110 when the power of the user system is turned off.
502
Figure 27.4-4 Pin control circuit
Write control pin
10 KΩ
/TICS pin
MB90F474,
MB90F476
Write control pin
User