R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 312

• Manufacturer Part Number: R5F21238DFP#U0
• Description: IC R8C/23 MCU FLASH 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/23r

Specifications of R5F21238DFP#U0

• Core Size: 16/32-Bit
• Program Memory Size: 64KB (64K x 8)
• Peripherals: POR, Voltage Detect, WDT
• Core Processor: R8C
• Speed: 20MHz
• Connectivity: CAN, I²C, LIN, SIO, SSU, UART/USART
• Number Of I /o: 41
• Program Memory Type: FLASH
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• No. Of I/o's: 41
• Ram Memory Size: 3KB
• Cpu Speed: 20MHz
• No. Of Timers: 4
• Digital Ic Case Style: LQFP
• Embedded Interface Type: CAN, I2C, UART
• Rohs Compliant: Yes
• Cpu Family: R8C
• Device Core Size: 16b
• Frequency (max): 20MHz
• Interface Type: I2C/UART
• Total Internal Ram Size: 3KB
• # I/os (max): 41
• Number Of Timers - General Purpose: 5
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 3V
• On-chip Adc: 12-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0K521237S000BE - KIT DEV RSK R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
• Eeprom Size: -
• Lead Free Status / Rohs Status: Compliant

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Figure 15.12
15.2.1
Table 15.7
i = 0 or 1
Bit Rate
14400
19200
28800
31250
38400
51200
(bps)
Divided-by-16 of frequency by the UiBRG (i = 0 or 1) register in UART mode is a bit rate.
1200
2400
4800
9600
Bit Rate
<UART Mode>
Calculation Formula of UiBRG (i = 0 or 1) Register Setting Value
Bit Rate Setting Example in UART Mode (Internal Clock Selected)
Source
UiBRG
• When selecting internal clock
• When selecting external clock
Count
f8
f8
f8
f1
f1
f1
f1
f1
f1
f1
Setting value to the UiBRG register =
Setting value to the UiBRG register =
Page 290 of 501
Setting Value
129 (81h)
129 (81h)
UiBRG
64 (40h)
32 (20h)
86 (56h)
64 (40h)
42 (2Ah)
39 (27h)
32 (20h)
23 (17h)
System Clock = 20 MHz
fj: Count source frequency of the UiBRG register (f1, f8 and f32)
fEXT: Count source frequency of the UiBRG register (external clock)
i = 0 or 1
Actual Time
14367.82
19230.77
29069.77
31250.00
37878.79
52083.33
1201.92
2403.85
4734.85
9615.38
(bps)
Error(%)
Setting
-1.36
-0.22
-1.36
0.16
0.16
0.16
0.16
0.94
0.00
1.73
Bit Rate × 16
Bit Rate × 16
Setting Value
fEXT
fj
UiBRG
51 (33h)
25 (19h)
12 (0Ch)
51 (33h)
34 (22h)
25 (19h)
16 (10h)
15 (0Fh)
12 (0Ch)
9 (09h)
System Clock = 8 MHz
- 1
- 1
Actual Time
14285.71
19230.77
31250.00
38461.54
50000.00
29411.76
1201.92
9615.38
2403.85
4807.69
(bps)
15. Serial Interface
Error(%)
Setting
-0.79
-2.34
0.16
0.16
0.16
0.16
0.16
2.12
0.00
0.16