UPD703034A Datasheet, PDF (19/56 Pages) NEC – V850/SB2TM 32-/16-BIT SINGLE-CHIP MICROCONTROLLERS

µPD703034A, 703034AY, 703035A, 703035AY, 70F3035A, 70F3035AY
3. PROGRAMMING FLASH MEMORY (µPD70F3035A, 70F3035AY ONLY)
There are the following two methods for writing a program to the flash memory.
(1) On-board programming
Write a program to the flash memory using a dedicated flash programmer after the µPD70F3035A and
70F3035AY have been mounted on the target board. Also mount a connector, etc. on the target board to
communicate with the dedicated flash programmer.
(2) Off-board programming
Write a program using a dedicated adapter before the µPD70F3035A and 70F3035AY have been mounted on
the target board.
3.1 Selecting Communication Mode
To write the flash memory, use a dedicated flash programmer and serial communication. Select a serial
communication mode from those listed in Table 3-1 in the format shown in Figure 3-1. Each communication mode is
selected by the number of VPP pulses shown in Table 3-1.
Communication Mode
CSI0
CSI0 + HS
UART0
Table 3-1. Communication Modes
Pins Used
SO0 (serial data output)
SI0 (serial data input)
SCK0 (serial clock input)
SO0 (serial data output)
SI0 (serial data input)
SCK0 (serial clock input)
P15 (3-wire + handshake signal output of handshake communication)
TXD0 (serial data output)
RXD0 (serial data input)
Number of VPP Pulses
0
3
8
Figure 3-1. Communication Mode Selecting Format
7.8 V
VPP 3.0 V
VSS
RESET
EVDD
VSS
Data Sheet U14780EJ1V0DS00
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