R5F212A8SNFP#U0 Renesas Electronics America, R5F212A8SNFP#U0 Datasheet - Page 118
![IC R8C/2A MCU FLASH 64LQFP](/photos/12/27/122783/r5f212a8snfp_u0_sml.jpg)
R5F212A8SNFP#U0
Manufacturer Part Number
R5F212A8SNFP#U0
Description
IC R8C/2A MCU FLASH 64LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/2Ar
Specifications of R5F212A8SNFP#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
55
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
3K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 5.5 V
Data Converters
A/D 12x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
64-LQFP
For Use With
R0K5212D8S001BE - KIT STARTER FOR R8C/2DR0K5212D8S000BE - KIT DEV FOR R8C/2D
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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R8C/2A Group, R8C/2B Group
Rev.2.00
REJ09B0324-0200
Figure 10.3
System Clock Control Register 0
b7 b6 b5 b4 b3 b2 b1 b0
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Set the PRC0 bit in the PRCR register to 1 (w rite enable) before rew riting the CM0 register.
The CM05 bit stops the XIN clock w hen the high-speed on-chip oscillator mode, low -speed on-chip oscillator mode is
selected. Do not use this bit to detect w hether the XIN clock is stopped. To stop the XIN clock, set the bits in the
follow ing order:
(a) Set bits OCD1 to OCD0 in the OCD register to 00b.
(b) Set the OCD2 bit to 1 (selects on-chip oscillator clock).
During external clock input, only the clock oscillation buffer is turned off and clock input is acknow ledged.
When the CM05 bit is set to 1 (XIN clock stopped) and the CM13 bit in the CM1 register is set to 0 (P4_6, P4_7), P4_6
and P4_7 can be used as input ports.
When entering stop mode, the CM06 bit is set to 1 (divide-by-8 mode).
The CM04 bit can be set to 1 by a program but cannot be set to 0.
To use the XCIN clock, set the CM04 bit to 1. Also, set ports P4_3 and P4_4 as input ports w ithout pull-up.
Set the CM07 bit to 1 from 0 (XCIN clock) after setting the CM04 bit to 1 (XCIN-XCOUT pin) and allow ing XCIN clock
oscillation to stabilize.
The MCU enters stop mode, the CM03 bit is set to 1 (high). Rew rite the CM03 bit w hile the XCIN clock oscillation
stabilizes.
Nov 26, 2007
CM0 Register
0 0
Bit Symbol
(b1-b0)
Symbol
CM02
CM03
CM04
CM05
CM06
CM07
CM0
Page 96 of 580
—
Reserved bits
WAIT peripheral function clock
stop bit
XCIN-XCOUT drive capacity
select bit
Port, XCIN-XCOUT sw itch bit
XIN clock (XIN-XOUT)
stop bit
System clock division select bit
0
CPU clock select bit
(5)
(1)
(2, 4)
(9)
Address
Bit Name
0006h
(8)
(6)
Set to 0.
0 : Peripheral function clock does not stop
1 : Peripheral function clock stops in w ait
0 : Low
1 : High
0 : I/O port P4_3, P4_4
1 : XCIN-XCOUT pin
0 : XIN clock oscillates
1 : XIN clock stops
0 : CM16, CM17 enabled
1 : Divide-by-8 mode
0 : System clock
1 : XCIN clock
in w ait mode
mode
After Reset
01101000b
(3)
Function
(7)
10. Clock Generation Circuit
RW
RW
RW
RW
RW
RW
RW
RW
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