UPD784938 Datasheet, PDF (673/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 28 µPD78F4938 PROGRAMMING
28.2 Flash Memory Programming Using Flashpro II and Flashpro III
Flash memory can be written while mounted on the target system (on-board writing). Connect the dedicated flash
programmer (Flashpro II (part number FL-PR2), Flashpro III (part number FL-PR3 and FG-FP3)) to the host computer and
target system for programming. Moreover, writing to flash memory can also be performed using a flash memory writing
adapter connected to Flashpro II or Flashpro III.
Remark FL-PR2 and FL-PR3 are products of Naito Densei Machida Mfg. Co., Ltd.
28.2.1 Selecting communication mode
The Flashpro II or III is used to write data into a flash memory by serial communications. Select the communication
mode for writing from Table 28-3. Figure 28-2 shows the format used to select the communication mode. Each
communication mode is selected with the number of VPP pulses shown in Table 28-3.
Table 28-3. Communication Mode
Communication Mode
3-wire serial I/O
UART
Number of Channels
Pins Used
1
SCK3/P105
SI3/P106
SO3/P107
1
RxD/P30
TxD/P31
Number of VPP Pulses
1
8
Caution Always select the communication mode using the number of VPP
pulses shown in Table 28-3.
Figure 28-2. Communication Mode Selection Format
10 V
VPP
VDD
VSS
VPP pulses
12
n
VDD
RESET
VSS
Flash memory write mode
Preliminary User’s Manual U13987EJ1V0UM00
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