Serial Interface Pins - NEC MuPD78F0132H User Manual

26.6.3 Serial interface pins

The pins used by each serial interface are listed below.
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.
78K0/KE1+
Input pin
440
CHAPTER 26 FLASH MEMORY
Table 26-6. Pins Used by Each Serial Interface
Serial Interface
CSI10
CSI10 + HS
UART6
Figure 26-12. Signal Collision (Input Pin of Serial Interface)
Signal collision
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.
User's Manual U16899EJ2V0UD
Pins Used
SO10, SI10, SCK10
SO10, SI10, SCK10, HS/P15
TxD6, RxD6
Dedicated flash programmer
connection pin
Other device
Output pin