MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 226

• Manufacturer Part Number: MC-78F0712-KIT
• Description: KIT REF SYSTEM 78K0 UPD78F0712
• Manufacturer: Renesas Electronics America

Specifications of MC-78F0712-KIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(9) Conversion results just after A/D conversion start
(10) A/D conversion result register (ADCR) read operation
(11) Internal equivalent circuit
224
Remarks 1. The resistance and capacitance values shown in Table 13-4 are not guaranteed values.
The first A/D conversion value immediately after A/D conversion starts may not fall within the rating range if the
ADCS bit is set to 1 within 1 s after the ADCS2 bit was set to 1, or if the ADCS bit is set to 1 with the ADCS2 bit
= 0. Take measures such as polling the A/D conversion end interrupt request (INTAD) and removing the first
conversion result.
When a write operation is performed to the A/D converter mode register (ADM) and analog input channel
specification register (ADS), the contents of ADCR may become undefined. Read the conversion result following
conversion completion before writing to ADM and ADS. Using a timing other than the above may cause an
incorrect conversion result to be read.
The equivalent circuit of the analog input block is shown below.
Table 13-4. Resistance and Capacitance Values of Equivalent Circuit (Reference Values)
2. n = 0 to 3
AV
4.5 V
Figure 13-23. Internal Equivalent Circuit of ANIn Pin
REF
ANIn
4 k
R1
CHAPTER 13 A/D CONVERTER
User’s Manual U17890EJ2V0UD
2.7 k
C1
R2
R1
8 pF
C1
C2
R2
1.4 pF
C2
C3
0.6 pF
C3