38D2 datasheet(10/136 Pages) RENESAS

10 / 136 page

Rev.3.02

Apr 10, 2008

Page 10 of 131

REJ03B0177-0302

38D2 Group

NOTE:

1. For detailed specifications, confirm the descriptions in the Datasheet.

Notes on Differences between QzROM and Flash Mem-

ory Versions

(1) The memory map, the writing modes and programming

circuits vary because of the differences in their internal

memories.

(2) The oscillation parameters of XIN-XOUT and XCIN-XCOUT

may vary.

(3) The QzROM version and the flash memory version MCUs

differ in their manufacturing processes, built-in ROM, and

layout patterns. Because of these differences, characteristic

values, operation margins, A/D conversion accuracy, noise

immunity, and noise radiation may vary within the specified

range of electrical characteristics.

(4) When switching from the flash memory version to the

QzROM version, implement system evaluations equivalent

to those implemented in the flash memory version.

(5) The both operations except the electrical characteristics are

same at the emulator (emulator MCU board: M38D29T-

RLFS).

Table 5

Differences between QzROM and flash memory versions

QzROM version

Flash memory version

Oscillation circuit at reset and at returning from stop mode

Main clock XIN or on-chip oscillator selectable

by OSCSEL pin

On-chip oscillator

Termination of OSCEL/CNVSS pin

OSCSEL = “H”

OSCSEL = “L”

CNVSS = “L”

Main clock oscillation at reset and at returning from

stop mode

Oscillation on

Stop

On-chip oscillator oscillation at reset and at returning

from stop mode

Stop

Oscillation on

System clock

φ oscillation at reset and at returning

from stop mode

f(XIN)/8

f(OCO)/32

Mounting of main clock oscillation circuit

Required

Optional

On-chip oscillator oscillation in low speed-mode

Stop

Stop by setting the on-chip

oscillator stop bit because it

is not stopped.

Writing “1” to on-chip oscillator stop bit in on-chip

oscillator mode

On-chip oscillator is stopped

On-chip oscillator is not

stopped

Reset input “L” pulse width

μs or more

2 ms or more

Absolute maximum rating: OSCSEL/CNVSS pin

−0.3 to 8.0

−0.3 to VCC + 0.3

Minimum operating power source voltage

1.8 V

2.7 V

A/D converter minimum operating power source voltage

2.0 V

2.7 V

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