R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 496

• Manufacturer Part Number: R5F21324CNSP#U0
• Description: MCU 1KB FLASH 16K ROM 20-LSSOP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/32Cr

Specifications of R5F21324CNSP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 15
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-LSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/32C Group
REJ09B0573-0100 Rev.1.00 Dec. 18, 2009
Page 467 of 573
28. Comparator B
Comparator B compares a reference input voltage and an analog input voltage. Comparator B1 and comparator B3 are
independent of each other.
28.1
Figure 28.1
Table 28.1
i = 1 or 3
Analog input voltage
Reference input voltage
Comparison result
Interrupt request
generation timing
Selectable functions
Port direction register
Port direction register
The comparison result of the reference input voltage and analog input voltage can be read by software. An input to
the IVREFi (i = 1 or 3) pin can be used as the reference input voltage.
Table 28.1 lists the Comparator B Specifications, Figure 28.1 shows a Comparator B Block Diagram, and Table
28.2 lists the I/O Pins.
Overview
IVCMP3
IVCMP1
IVREF3
IVREF1
INT3
INT1
Item
Comparator B Specifications
Comparator B Block Diagram
INT1CP0, INT1COUT, INT3CP0, INT3COUT: Bits in INTCMP register
INT1EN, INT1PL, INT3EN, INT3PL: Bits in INTEN register
INT1F0, INT1F1, INT3F0, INT3F1: Bits in INTF register
+
+
-
-
Input voltage to the IVCMPi pin
Input voltage to the IVREFi pin
Read from the INTiCOUT bit in the INTCMP register
When the comparison result changes.
• Digital filter function
Whether the digital filter is applied or not and the sampling frequency can
be selected.
f32
f32
f1
f8
f1
f8
= 01b
= 10b
= 11b
INT3F1 to INT3F0
INT1F1 to INT1F0
=01b
=10b
=11b
INT3CP0 = 0
INT3CP0 = 1
INT1CP0 = 1
INT1CP0 = 0
INT3COUT
INT1COUT
Sampling clock
Sampling clock
(3 times match)
(3 times match)
Digital filter
Digital filter
INT1F1 to INT1F0
INT3F1 to INT3F0
= other than 00b
= other than 00b
Specification
= 00b
= 00b
Both edge
Both edge
detection
detection
circuit
circuit
INT3PL = 0
INT1PL = 0
INT3EN
INT1EN
INT3PL = 1
INT1PL = 1
28. Comparator B
To INT3 interrupt
To INT1 interrupt