R5F21294SNSP#U0 Renesas Electronics America, R5F21294SNSP#U0 Datasheet - Page 353

• Manufacturer Part Number: R5F21294SNSP#U0
• Description: MCU 3/5V 16K+2K 20PIN-SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/29r

Specifications of R5F21294SNSP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/28 Group, R8C/29 Group
Rev.2.10
REJ09B0279-0210
18.2
Figure 18.6
Table 18.3
A/D Control Register 0
Function
Start conditions
Stop condition
Interrupt request
generation timing
Input pin
Reading of result of A/D
converter
In repeat mode, the input voltage of one selected pin is A/D converted repeatedly.
Table 18.3 lists the Specifications of Repeat Mode. Figure 18.6 shows the ADCON0 Register in Repeat Mode and
Figure 18.7 shows the ADCON1 Register in Repeat Mode.
b7 b6 b5 b4
NOTES:
1.
2.
3.
4.
0 1 1
If the ADCON0 register is rew ritten during A/D conversion, the conversion result is undefined.
Bits CH0 to CH2 are enabled w hen the ADGSEL0 bit is set to 1. Write to bits CH0 to CH2 after setting the ADGSEL0 bit
to 1.
When changing A/D operation mode, set the analog input pin again.
Set øAD frequency to 10 MHz or below .
Repeat Mode
Sep 26, 2008
b3 b2 b1 b0
Item
1
Specifications of Repeat Mode
ADCON0 Register in Repeat Mode
Bit Symbol
ADGSEL0
ADCON0
(1)
Symbol
ADST
CKS0
CH0
CH1
CH2
(b5)
MD
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The Input voltage of one pin selected by bits CH2 to CH0 is A/D converted
repeatedly
Set the ADST bit to 1 (A/D conversion starts)
Set the ADST bit to 0
Not generated
Select one of AN8 to AN11
Read AD register
Analog input pin select
bits
A/D operating mode select
bit
A/D input group select bit
Reserved bit
A/D conversion start flag
Frequency select bit 0
(3)
(2)
Address
Bit Name
00D6h
b2 b1 b0
1 : Repeat mode
0 : Disabled
1 : Enabled (AN8 to AN11)
Set to 0.
0 : Stops A/D conversion
1 : Starts A/D conversion
[When CKS1 in ADCON1 register = 0]
0 : Selects f4
1 : Selects f2
[When CKS1 in ADCON1 register = 1]
0 : Selects f1
1 : Do not set.
1 0 0 : AN8
1 0 1 : AN9
1 1 0 : AN10
1 1 1 : AN11
Other than above : Do not set.
Specification
(4)
After Reset
Function
00h
18. A/D Converter
RW
RW
RW
RW
RW
RW
RW
RW
RW