R5F21276SNFP#U0 Renesas Electronics America, R5F21276SNFP#U0 Datasheet - Page 101
R5F21276SNFP#U0
Manufacturer Part Number
R5F21276SNFP#U0
Description
IC R8C/27 MCU FLASH 32LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/27r
Specifications of R5F21276SNFP#U0
Core Size
16/32-Bit
Program Memory Size
32KB (32K x 8)
Core Processor
R8C
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
LED, POR, Voltage Detect, WDT
Number Of I /o
25
Program Memory Type
FLASH
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
32-LQFP
No. Of I/o's
25
Ram Memory Size
1.5KB
Cpu Speed
20MHz
No. Of Timers
4
Digital Ic Case Style
LQFP
Supply Voltage Range
2.2V To 5.5V
Embedded Interface Type
I2C, UART
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
R0K521276S000BE - KIT DEV RSK-R8C/26-29R0E521000EPB00 - PROBE EMULATOR FOR PC7501
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
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R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
Figure 10.3
System Clock Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Set the PRC0 bit in the PRCR register to 1 (w rite enable) before rew riting the CM1 register.
When entering stop mode, the CM15 bit is set to 1 (drive capacity high).
When the CM06 bit is set to 0 (bits CM16, CM17 enabled), bits CM16 to CM17 are enabled.
If the CM10 bit is set to 1 (stop mode), the on-chip feedback resistor is disabled.
When the OCD2 bit is set to 0 (XIN clock selected), the CM14 bit is set to 1 (low -speed on-chip oscillator stopped).
When the OCD2 bit is set to 1 (on-chip oscillator clock selected), the CM14 bit is set to 0 (low -speed on-chip
oscillator on). It remains unchanged even if 1 is w ritten to it.
When using the voltage monitor 1 interrupt or voltage monitor 2 interrupt (w hen using the digital filter), set the CM14
bit to 0 (low -speed on-chip oscillator on).
When the CM10 bit is set to 1 (stop mode) and the CM13 bit is set to 1 (XIN-XOUT pin), the XOUT (P4_7) pin goes “H”.
When the CM13 bit is set to 0 (input ports, P4_6, P4_7), P4_7 (XOUT) enters input mode.
In count source protect mode (refer to 13.2 Count Source Protection Mode Enabled), the value remains
unchanged even if bits CM10 and CM14 are set.
Once the CM13 bit is set to 1 by a program, it cannot be set to 0.
For J, K version, the XCIN clock oscillation circuit cannot be used. Set to 0.
Sep 26, 2008
CM1 Register
Bit Symbol
Symbol
CM10
CM11
CM12
CM13
CM14
CM15
CM16
CM17
CM1
Page 82 of 453
All clock stop control bit
XIN-XOUT on-chip feedback resistor
select bit
XCIN-XCOUT on-chip feedback
resistor select bit
Port XIN-XOUT sw itch bit
Low -speed on-chip oscillation stop
bit
XIN-XOUT drive capacity select bit
System clock division select bits 1
(1)
(5, 6, 8)
Address
Bit Name
0007h
(10)
(4, 7, 8)
(7, 9)
(3)
(2)
b7 b6
0 0 : No division mode
0 1 : Divide-by-2 mode
1 0 : Divide-by-4 mode
1 1 : Divide-by-16 mode
0 : Clock operates
1 : Stops all clocks (stop mode)
0 : On-chip feedback resistor enabled
1 : On-chip feedback resistor disabled
0 : On-chip feedback resistor enabled
1 : On-chip feedback resistor disabled
0 : Input ports P4_6, P4_7
1 : XIN-XOUT pin
0 : Low -speed on-chip oscillator on
1 : Low -speed on-chip oscillator off
0 : Low
1 : High
After Reset
00100000b
Function
10. Clock Generation Circuit
RW
RW
RW
RW
RW
RW
RW
RW
RW
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