RX21A_15 Datasheet, PDF (11/132 Pages) Renesas Technology Corp – Renesas MCUs

RX21A Group
Table 1.4
Pin Functions (3 / 3)
Classifications
Comparator A
Pin Name
CMPA1
Comparator B
Analog power
supply
CMPA2
CVREFA
CMPB0
CVREFB0
CMPB1
CVREFB1
AVCC0
AVSS0
VREFH0
VREFL0
VREFH
VREFL
AVCCA
AVSSA
VREFDSH
VREFDSL
VCOMDS
I/O ports
BGR_BO
P03, P05, P07
P12 to P17
P20 to P27
P30 to P37
P40 to P43
P50 to P55
PA0 to PA7
PB0 to PB7
PC0 to PC7
PE6, PE7
PH0 to PH3
PJ1, PJ3
1. Overview
I/O
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
—
Input
—
Input
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Description
Input pin for the comparator A1 analog signals.
Input pin for the comparator A2 analog signals.
Input pin for the comparator reference voltage.
Input pin for the comparator B0 analog signals.
Input pin for the comparator B0 reference voltage.
Input pin for the comparator B1 analog signals.
Input pin for the comparator B1 reference voltage.
Analog voltage supply pin for the 10-bit A/D converter. Connect this
pin to VCC if the 10-bit A/D converter is not to be used.
Analog ground pin for the 10-bit A/D converter. Connect this pin to
VSS if the 10-bit A/D converter is not to be used.
Reference voltage supply pin for the 10-bit A/D converter. Connect
this pin to VCC if the 10-bit A/D converter is not to be used.
Reference ground pin for the 10-bit A/D converter. Connect this pin
to VSS if the 10-bit A/D converter is not to be used.
Analog voltage supply pin for the D/A converter. Connect this pin to
VCC if the D/A converter is not to be used.
Analog ground pin for the D/A converter. Connect this pin to VSS if
the D/A converter is not to be used.
Analog voltage supply pin for the 24-bit ∆Σ A/D converter. Connect
this pin to the VCC if the 24-bit ∆Σ A/D converter is not to be used.
Analog ground pin for the 24-bit ∆Σ A/D converter. Connect this pin
to VSS if the 24-bit ∆Σ A/D converter is not to be used.
Reference voltage supply pin for the 24-bit ∆Σ A/D converter.
Connect this pin to the VREFDSL pin via a 1F capacitor.
Leave this pin open if the 24-bit ∆Σ A/D converter is not to be used.
Reference voltage ground pin for the 24-bit ∆Σ A/D converter.
Connect this pin to VSS if the 24-bit ∆Σ A/D converter is not to be
used.
Common mode voltage pin for the 24-bit ∆Σ A/D converter. Connect
this pin to the AVSSA pin via a 0.1F capacitor. Leave this pin open
if the 24-bit ∆Σ A/D converter is not to be used.
Internal reference voltage input pin for the 24-bit ∆Σ A/D converter.
Leave this pin open if the 24-bit ∆Σ A/D converter is not to be used.
3-bit input/output pins.
6-bit input/output pins.
8-bit input/output pins.
8-bit input/output pins. (P35 input pins)
4-bit input/output pins.
6-bit input/output pins.
8-bit input/output pins.
8-bit input/output pins.
8-bit input/output pins.
2-bit input/output pins.
4-bit input/output pins.
2-bit input/output pins.
R01DS0129EJ0110 Rev.1.10
Aug 28, 2014
Page 11 of 132