upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 758

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

21.6.3 Serial interface pin
The pins used by each serial interface are shown in the table below.
When connecting a dedicated flash programmer to a serial interface pin that is connected to another
device on board, exercise care so that signal conflict and malfunction of the other device do not occur.
(1)
758
Conflict of signals
When the dedicated flash programmer (output) is connected to a serial interface pin (input) that is
connected to another device (output), a conflict of signals occurs. To avoid the conflict of signals,
isolate the connection to the other device or set the other device in an output high-impedance
state.
Figure 21-8: Signal Conflict (Input Pin of Serial Interface)
CSIB0
CSIB0 + HS
UARTA0
Input pin
Table 21-3: Pins Used by each Serial Interface
Serial Interface
User’s Manual U16702EE3V2UD00
Chapter 21 Flash Memory
Conflict of signals
SOB0, SIB0, SCKB0
SOB0, SIB0, SCKB0, PCM0
TXDA0, RXDA0
Dedicated flash programmer
connection pins
Other device
Output pin
Pins Used