NEC 78K0 Series User Manual page 570

26.7.3 Selecting communication mode
In the 78K0/KE2, a communication mode is selected by inputting pulses (up to 11 pulses) to the FLMD0 pin after
the dedicated flash memory programming mode is entered.
programmer.
The following table shows the relationship between the number of pulses and communication modes.
Communication
Mode
Port
UART UART-ch0
(UART6)
3-wire serial I/O SIO-ch0
(CSI10)
Notes 1. Selection items for Standard settings on FlashPro4.
2. The possible setting range differs depending on the voltage. For details, refer to the chapter of electrical
specifications.
3. Because factors other than the baud rate error, such as the signal waveform slew, also affect UART
communication, thoroughly evaluate the slew as well as the baud rate error.
Caution When UART6 is selected, the receive clock is calculated based on the reset command sent from the
dedicated flash programmer after the FLMD0 pulse has been received.
Remark f : X1 clock
X
f : External main system clock
EXCLK
f : Internal high-speed oscillation clock
RH
570
CHAPTER 26 FLASH MEMORY
Table 26-7. Communication Modes
Note 1
Standard Setting
Speed On Target
Note 3
115200 bps Optional
2.4 kHz to
2.5 MHz
Preliminary User's Manual U17260EJ3V1UD
These FLMD0 pulses are generated by the flash
Pins Used
Frequency Multiply
Rate
1 to 20 1.0 TxD6, RxD6
Note 2
MHz
SO10, SI10,
SCK10
Peripheral Number of
Clock FLMD0
Pulses
f 0
X
f 3
EXCLK
f 8
RH