38D2 datasheet(65/136 Pages) RENESAS

65 / 136 page

Rev.3.02

Apr 10, 2008

Page 65 of 131

REJ03B0177-0302

38D2 Group

QzROM WRITING MODE

In the QzROM writing mode, the user ROM area can be

rewritten while the microcomputer is mounted on-board by using

a serial programmer which is applicable for this microcomputer.

Table 14 lists the pin description (QzROM writing mode) and

Figure 65 shows the pin connection.

Refer to Figure 66 to Figure 69 for examples of a connection

with a serial programmer.

Contact the manufacturer of your serial programmer for serial

programmer. Refer to the user ’s manual of your serial

programmer for details on how to use it.

Table 14 Pin description (QzROM writing mode)

Name

I/O

Function

VCC, VSS

Power source

Input

• Apply 2.7 to 5.5 V to VCC, and 0 V to VSS.

RESET

Reset input

Input

• Reset input pin for active “L”. Reset occurs when RESET pin is

held at an “L” level for 16 cycles or more of XIN.

XIN

Clock input

Input

• Set the same termination as the single-chip mode.

XOUT

Clock output

Output

VREF

Analog reference

voltage

Input

• Input the reference voltage of A/D converter to VREF.

AVSS

Analog power source

Input

• Connect AVss to Vss.

P00

−P07

P10

−P17

P20

−P27

P33

−P37

P40

−P47

P50

−P57

P60

−P62

I/O port

I/O

• Input “H” or “L” level signal or leave the pin open.

OSCSEL

VPP input

Input

• QzROM programmable power source pin.

P32

ESDA input/output

I/O

• Serial data I/O pin.

P31

ESCLK input

Input

• Serial clock input pin.

P30

ESPGMB input

Input

• Read/program pulse input pin.

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