m30262f8gp Renesas Electronics Corporation., m30262f8gp Datasheet - Page 168

• Manufacturer Part Number: m30262f8gp
• Description: Renesas 16-bit Cmos Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

A-D Converter
162
Figure 1.16.9. Example connection of V
(a) Sample and Hold
(b) Caution of using A-D converter
Sample and hold is selected by setting bit 0 of the A-D control register 2 (address 03D4
sample and hold is selected, the rate of conversion of each pin increases. As a result, a 28 f
achieved in 8-bit resolution and 33 f
modes. However, in all modes, be sure to specify whether to use sample and hold before starting A-D
conversion.
(1) Set the port direction bits corresponding to the following pins to input: those P10 pins to be used for
(2) In using a key-input interrupt, none of 4 pins (AN
(3) Insert the capacitor between AV
analog input, plus external trigger input pin (P1
(if the A-D input voltage goes to ‘‘L’’ level, a key-input interrupt occurs).
pin (ANi) and AV
due to noise. Figure 1.16.9 is an example connection of each pin.
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
Note 1: C1 ≥ 0.47uF, C2 ≥ 0.47uF, C3 ≥ 100pF, C4 ≥ 0.1uF (reference)
Note 2: Ensure these connections are as thick and short as possible.
SS
, to prevent a malfunction or program runaway, and to reduce conversion error,
C4
Renesas Technology Corp.
CC
Microcomputer
V
V
CC
CC
SS
and AV
AD
, V
in 10-bit resolution. Sample and hold can be selected in all
SS
, AV
SS
AV
AV
V
, between V
REF
ANi
CC
CC
SS
4
5
through AN
).
, AV
C1
C3
SS
, V
REF
REF
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
7
) can be used as an A-D conversion port
and AVss, and between the analog input
C2
and ANi
M16C/26 Group
16
) to "1". When
AD
cycle is