SH7055S Datasheet, PDF (624/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

17.1.3 Pin Configuration
Table 17.1 summarizes the A/D converter’s input pins. There are 32 analog input pins, AN0 to
AN31. The 12 pins AN0 to AN11 are A/D0 analog inputs, divided into three groups: AN0 to AN3
(group 0), AN4 to AN7 (group 1), and AN8 to AN11 (group 2). The 12 pins AN12 to AN23 are
A/D1 analog inputs, divided into three groups: AN12 to AN15 (group 3), AN16 to AN19 (group
4), and AN20 to AN23 (group 5). The 8 pins AN24 to AN31 are A/D2 analog inputs, divided into
two groups: AN24 to AN27 (group 6), and AN28 to AN31 (group 7).
The ADTRG0 and ADTRG1 pins are used to provide A/D conversion start timing from off-chip.
When a low level is applied to one of these pins, A/D0, A/D1, or A/D2 starts conversion.
The ADEND pin is an output used to monitor conversion timing when channel 31 is used in scan
mode.
The AV_CC and AV_SS pins are power supply voltage pins for the analog section in A/D converter
modules A/D0 to A/D2. The AV_ref pin is the A/D converter module A/D0 to A/D2 reference
voltage pin.
To maintain chip reliability, ensure that AV_CC = 5 V ±0.5 V and AV_SS = V_SS during normal
operation, and never leave the AV_CC and AV_SS pins open, even when the A/D converter is not
being used.
The voltage applied to the analog input pins should be in the range AV_SS = ANn = AV_ref.
Rev.2.0, 07/03, page 586 of 960