SH7211 Datasheet, PDF (1184/1228 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family

Item
Page
17.4.3 Input Sampling 786
and A/D Conversion
Time
Figure 17.4 A/D
Conversion Timing
(Single-Cycle Scan
Mode)
17.7.4 Notes on Board 793
Design
17.7.5 Notes on Noise 794
Countermeasures
Figure 17.8 Example of
Analog Input Pin
Protection Circuit
17.7.7 Treatment of 794
AV_CC and AV_SS When the
A/D Converter is Not
Used
18.5.3 Setting Analog 801
Input Voltage
Revision (See Manual for Details)
Figure amended
ADF
Conversion time
per channel
50 states
Aφ = 40 MHz: 1.25 μs
End of A/D
conversion
Description amended
Also, digital circuitry must be isolated from the analog input
signals (AN0 to AN7), analog reference power supply
(AVREF), the analog power supply (AV_CC), the analog
ground (AV_SS), and the analog reference ground (AVREFV_SS).
Also, AV_SS should be connected at one point to a stable digital
ground (V_SS) on the board.
Figure amended
4.5 V to 5.5 V
GND
10 μF
Analog input pin
(channel 0 to 7)
Newly added
0.1 μF
0.1 μF
100 Ω
0.1 μF
AVCC
AVSS
AVREFH
AVREFVSS
SH7211F
AN0 to AN7
Description amended
1. AV_CC and AV_SS input voltages
Input voltages AVCC and AV_SS should be VCC ≤ AVCC ≤ 5.0 V
± 0.5 V and AV_SS = V_SS. Do not leave the AV_CC and AV_SS
pins open when the A/D converter or D/A converter is not
in use and in software standby mode. When not in use,
connect AV_CC to the power supply (V_CCQ) and AV_SS to the
ground (V_SSQ).
2. Setting range of AVREF input voltage
Set the voltage range of the AVREF pin as AVREF = AV_CC
± 0.3 V when the A/D converter or D/A converter is used,
or as AVREF = AV_CC when no A/D converter or D/A
converter is used.
Rev. 2.00 May. 08, 2008 Page 1160 of 1200
REJ09B0344-0200