38K2 datasheet(256/358 Pages) RENESAS

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2.14 Flash memory

Rev.2.00

Oct 15, 2006

page 107 of 112

38K2 Group

REJ09B0338-0200

APPLICATION

2.14.7 Flash memory mode application examples

The control pin processing example on the system board in the standard serial I/O mode and the control

example in the CPU rewrite mode are described below.

(1)

Control pin connection example on the system board in standard serial I/O mode

As shown in Figure 2.14.4, in the standard serial I/O mode, the built-in flash memory can be rewritten

with the microcomputer mounted on board. Connection examples of control pins (P40/EXDREQ/RXD,

______

____________

P41/EXDACK/TXD, P42/EXTC/SCLK, P43/EXA1/SRDY, P16, CNVSS, and RESET pin) in the standard serial

I/O mode are described below.

Fig. 2.14.4 Rewrite example of built-in flash memory in standard serial I/O mode

RS-232C

M38K29F8FP/HP

M38K29F8LFP/LHP

Serial programmer

Table 2.14.3 shows the setting condition in the standard serial I/O mode.

Table 2.14.3 Setting condition in serial I/O mode

Pin name

CNVSS/VPP (Note)

P16

P42/EXTC/SCLK

____________

RESET

Pin number

38K2 Group flash memory version

Note: CNVSS/VPP is not VCC but a voltage when programming.

4.50 to 5.25 V

VCC

Edge from VSS to VCC

Value

38K2 Datasheet(PDF) 256 Page - Renesas Technology Corp