M30620FCAFP datasheet(443/615 Pages) RENESAS

443 / 615 page

A-D Converter

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

2-126

In single sweep mode, choose functions from those listed in Table 2.7.7. Operations of the circled items

are described below. Figure 2.7.15 shows timing chart, and Figure 2.7.16 shows the set-up procedure.

2.7.7 Operation of A-D Converter (in single sweep mode)

Figure 2.7.15. Operation timing of single sweep mode

Item

Set-up

Operation clock AD

Divided-by-4 fAD / divided-

by-2 fAD / fAD

8-bit / 10-bit

External ope-amp

connection mode

Expanded analog

input pin

Not used

Resolution

Analog input pin

AN0 and AN1 (2 pins) / AN0

to AN3 (4 pins) / AN0 to AN5

(6 pins) / AN0 to AN7 (8 pins)

Software trigger

Trigger for starting A-

D conversion

Trigger by ADTRG

Sample & Hold

Not activated

Activated

Operation (1) Setting the A-D conversion start flag to “1” causes the A-D converter to start the conversion

on voltage input to the AN0 pin.

(2) After the A-D conversion of voltage input to the AN0 pin is completed, the content of the

successive comparison register (conversion result) is transmitted to A-D register 0. The A-D

converter converts all analog input pins selected by the user. The conversion result is trans-

mitted to A-D register i corresponding to each pin, every time conversion on one pin is com-

pleted.

(3) When the A-D conversion on all the analog input pins selected is completed, the A-D conver-

sion interrupt request bit goes to “1”. At this time, the A-D conversion start flag goes to “0”.

The A-D converter stops operating.

Table 2.7.7. Choosed functions

Cleared to “0” when interrupt request is accepted, or cleared by software

A-D conversion

start flag

“1”

“0”

A-D register 0

A-D register 1

φAD

A-D register i

Result

Set to “1” by software

8-bit resolution : 28

φAD cycles

10-bit resolution : 33

φAD cycles

8-bit resolution : 28

φAD cycles

10-bit resolution : 33

φAD cycles

(1) Start A-D conversion

After A-D conversion on AN0 pin is complete,

A-D converter begins converting all pins selected

A-D conversion

is complete

(2)

Note: When

φAD frequency is less than 1MHZ, sample and hold function cannot be selected.

Conversion rate per analog input pin is 49

φAD cycles for 8-bit resolution and 59 φAD cycles for 10-bit resolution.

(3)

A-D conversion

interrupt request

bit

“1”

“0”

M30620FCAFP Datasheet(PDF) 443 Page - Renesas Technology Corp

M30620FCAFP Datasheet(HTML) 443 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL