CHAPTER 26 FLASH MEMORY
User’s Manual U16899EJ2V0UD
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26.6.3 Serial interface pins
The pins used by each serial interface are listed below.
Table 26-6. Pins Used by Each Serial Interface
Serial Interface
Pins Used
CSI10
SO10, SI10, SCK10
CSI10 + HS
SO10, SI10, SCK10, HS/P15
UART6 TxD6,
RxD6
To connect the dedicated flash programmer to the pins of a serial interface that is connected to another device on
the board, care must be exercised so that signals do not collide or that the other device does not malfunction.
(1) Signal
collision
If the dedicated flash programmer (output) is connected to a pin (input) of a serial interface connected to another
device (output), signal collision takes place. To avoid this collision, either isolate the connection with the other
device, or make the other device go into an output high-impedance state.
Figure 26-12. Signal Collision (Input Pin of Serial Interface)
Input pin
Signal collision
Dedicated flash programmer
connection pin
Other device
Output pin
In the flash memory programming mode, the signal output by the device
collides with the signal sent from the dedicated flash programmer.
Therefore, isolate the signal of the other device.
78K0/KE1+