Flmd0 - NEC 78K0R/KE3 User Manual

2.2.18 FLMD0

This is a pin for setting flash memory programming mode.
Perform either of the following processing.
(a) In normal operation mode
It is recommended to leave this pin open during normal operation.
The FLMD0 pin must always be kept at the V
down externally because it is internally pulled down by reset. However, pulling it down must be kept selected
(i.e., FLMDPUP = "0", default value) by using bit 7 (FLMDPUP) of the background event control register
(BECTL) (see 23.5 (1) Back ground event control register). To pull it down externally, use a resistor of
200 kΩ or smaller.
Self programming and the rewriting of flash memory with the programmer can be prohibited using hardware,
by directly connecting this pin to the V
(b) In self programming mode
It is recommended to leave this pin open when using the self programming function. To pull it down
externally, use a resistor of 100 kΩ to 200 kΩ.
In the self programming mode, the setting is switched to pull up in the self programming library.
(c) In flash memory programming mode
Directly connect this pin to a flash memory programmer when data is written by the flash memory
programmer. This supplies a writing voltage of the V
The FLMD0 pin does not have to be pulled down externally because it is internally pulled down by reset. To
pull it down externally, use a resistor of 1 kΩ to 200 kΩ.
CHAPTER 2 PIN FUNCTIONS
level before reset release but does not have to be pulled
SS
pin.
SS
level to the FLMD0 pin.
DD
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