78F0988 View Datasheet(PDF) - NEC => Renesas Technology
Part Name
Description
Manufacturer
78F0988 Datasheet PDF : 52 Pages
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µPD78F0988A, 78F0988A(A)
6. FLASH MEMORY PROGRAMMING
On-board writing of flash memory (with device mounted on target system) is supported. On-board writing is done
after connecting a dedicated flash programmer (Flashpro III (part numbers FL-PR3 and PG-FP3)) to the host machine
and target system. Moreover, writing to flash memory can also be performed using a flash memory writing adapter
connected to Flashpro III.
Remark FL-PR3 is a product of Naito Densei Machida Mfg. Co., Ltd.
6.1 Selection of Communication Mode
Writing to flash memory is performed using Flashpro III with a serial communication mode. Select the communi-
cation mode for writing from Table 6-1. For the selection of the communication mode, a format like the one shown
in Figure 6-1 is used. The communication modes are selected using the VPP pulse numbers shown in Table 6-1.
Table 6-1. Communication Mode List
Communication Mode
3-wire serial I/O
Number of
Channels
1
3-wire serial I/O + HS
1
UART
1
Pseudo 3-wire serial I/O
1
modeNote 2
Pin UsedNote 1
SCK/P51
SI/P52
SO/P53
P50 (HS)
SCK/P51
SI/P52
SO/P53
RxD00/P20
TxD00/P21
P24/TI50/TO50 (Serial data input)
P25/TI51/TO51 (Serial data output)
P26/TI52/TO52 (Serial clock input)
Number of
VPP Pulses
0
3
8
12
Notes 1. Shifting to the flash memory programming mode sets all pins not used for flash memory programming to the
same state as that immediately after reset. If the external device connected to each port does not
acknowledge the state immediately after reset, pin handling such as connecting to VDD or VSS via a resistor
is required.
2. Serial transfer is performed by controlling ports using software.
Caution Always select the communication mode according to the number of VPP pulses shown in Table 6-
1.
Figure 6-1. Communication Mode Selection Format
10 V
VPP
VDD
VSS
VDD
RESET
VSS
VPP pulses
12
n
Flash memory write mode
Data Sheet U15801EJ1V0DS
19
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