SH7050 Datasheet, PDF (454/841 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH RISC engine Family/

Section 14 A/D Converter
14.1.3 Pin Configuration
Table 14.1 summarizes the A/D converter’s input pins. There are 16 analog input pins, AN0 to
AN15. 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 four pins AN12 to AN15 are
A/D1 analog inputs, comprising analog input group 3.
The ADTRG pin is used to provide A/D conversion start timing from off-chip. When a low-level
pulse is applied to this pin, the A/D converter starts conversion. This pin is shared by A/D0 and
A/D1.
The ADEND pin is an output used to monitor conversion timing when channel 15 is used in scan
mode.
The AV_CC and AV_SS pins are power supply voltage pins for the analog section in the A/D
converter. The AV_ref pin is the A/D converter reference voltage pin. These pins are also shared by
A/D0 and A/D1.
To maintain chip reliability, ensure that AV_CC = V_CC ±10% 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. 5.00 Jan 06, 2006 page 434 of 818
REJ09B0273-0500