Datasheet

CHAPTER 24 FLASH MEMORY
User’s Manual U18698EJ1V0UD
518
24.6.3 Selecting communication mode
In the 78K0/LC3, a communication mode is selected by inputting pulses to the FLMD0 pin after the dedicated flash
memory programming mode is entered. These FLMD0 pulses are generated by the flash memory programmer.
The following table shows the relationship between the number of pulses and communication modes.
Table 24-6. Communication Modes
Standard Setting
Note 1
Communication
Mode
Port Speed Frequency Multiply Rate
Pins Used Peripheral
Clock
Number of
FLMD0
Pulses
UART-Ext-Osc fX 0 UART
(UART6)
UART-Ext-FP4CK
115,200 bps
Note 3
2 to 10 MHz
Note 2
1.0 TxD6, RxD6
f
EXCLK 3
Notes 1. Selection items for Standard settings on GUI of the flash memory programmer.
2. The possible setting range differs depending on the voltage. For details, see CHAPTER 27 ELECTRICAL
SPECIFICATIONS (STANDARD PRODUCTS).
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 memory programmer after the FLMD0 pulse has been received.
Remark f
X: X1 clock
fEXCLK: External main system clock