R5F21274SDFP#U0 Renesas Electronics America, R5F21274SDFP#U0 Datasheet - Page 124
R5F21274SDFP#U0
Manufacturer Part Number
R5F21274SDFP#U0
Description
IC R8C/27 MCU FLASH 32LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/27r
Datasheet
1.R5F21272SDFPU0.pdf
(487 pages)
Specifications of R5F21274SDFP#U0
Core Processor
R8C
Core Size
16/32-Bit
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
LED, POR, Voltage Detect, WDT
Number Of I /o
25
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 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
For Use With
R0K521276S000BE - KIT DEV RSK-R8C/26-29R0E521000EPB00 - PROBE EMULATOR FOR PC7501
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
R5F21274SDFP#U0R5F21274SDFP#V2
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
Figure 10.18
Table 10.6
NOTE:
Oscillation stop detection
((a) or (b))
Watchdog timer
Voltage monitor 1
Voltage monitor 2
Generated Interrupt Source
1. For N, D version only.
Sep 26, 2008
Voltage Monitor 1, and Voltage Monitor 2 Interrupts
Procedure for Switching Clock Source from Low-Speed On-Chip Oscillator to XIN
Clock
Determining Interrupt Source for Oscillation Stop Detection, Watchdog Timer,
(1)
Page 105 of 453
NO
(a) OCD3 bit in OCD register = 1
(b) OCD1 to OCD0 bits in OCD register = 11b and OCD2 bit = 1
VW2C3 bit in VW2C register = 1
VW1C2 bit in VW1C register = 1
VW2C2 bit in VW2C register = 1
Set OCD1 to OCD0 bits to 00b
that OCD3 bit is set to 0 (XIN
Multiple confirmations
Switch to XIN clock
clock oscillates) ?
Set OCD2 bit to 0
(select XIN clock)
End
YES
Bit Showing Interrupt Cause
OCD3 to OCD0: Bits in OCD register
10. Clock Generation Circuit
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