R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 93

• Manufacturer Part Number: R5F21257SNFP#U0
• Description: IC R8C/25 MCU FLASH 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21257SNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K 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: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 10.1
Interrupt request
Power-on reset
Software reset
RESET
CM05
CM02, CM04, CM05, CM06, CM07: Bits in CM0 register
CM10, CM13, CM14, CM16, CM17: Bits in CM1 register
OCD0, OCD1, OCD2: Bits in OCD register
FRA00, FRA01: Bits in FRA0 register
Oscillation Stop Detection Circuit
CM10 = 1 (stop mode)
CM04
Feb 29, 2008
XIN
WAIT instruction
XCIN
XIN clock
Clock Generation Circuit
CM13
XCOUT
CM13
XOUT
Pulse generation
circuit for clock edge
detection and
charge, discharge
control circuit
R
R
S Q
S Q
Page 74 of 485
FRA00
CM14
CM02
Frequency adjustable
XIN clock
Forcible discharge when OCD0 = 0
Charge,
discharge
circuit
a
FRA1 register
Oscillation
stop
detection
High-speed
on-chip
oscillator
Low-speed
on-chip
oscillator
b
OCD1
CM06 = 0
CM17 to CM16 = 00b
fC
FRA01 = 1
FRA01 = 0
System clock
1/2
OCD2 = 1
OCD2 = 0
fOCO-S
Divider
c
FRA2 register
Oscillation stop detection
interrupt generation
circuit detection
CM06 = 0
CM17 to CM16 = 01b
fOCO
1/2
On-chip oscillator
clock
Watchdog timer
interrupt
Voltage monitor 1
interrupt
Voltage monitor 2
interrupt
OCD2 bit switch signal
CM14 bit switch signal
a
1/4
b
Clock prescaler
d
CM06 = 0
CM17 to
CM16 = 10b
c
Divider
fOCO-F
d
1/2
Power-on
reset circuit
Voltage
detection
circuit
e
g
fOCO40M
1/8
h
fC
CM07 = 0
CM07 = 1
f2
f4
e
f1
f8
f32
(1/128)
CM06 = 1
Divider
INT0
fC32
1/2
Timer RA
fC4
Watchdog
Oscillation stop detection,
Watchdog timer,
Voltage monitor 1 interrupt,
Voltage monitor 2 interrupt
fOCO128
timer
CM06 = 0
CM17 to CM16 = 11b
Timer RB
Detail of divider
1/2
h
Timer RD
g
CPU clock
10. Clock Generation Circuit
Timer RE
converter
A/D
UART0
UART1
I
2
SSU /
C bus