R5F21256SNFP#U0 Renesas Electronics America, R5F21256SNFP#U0 Datasheet - Page 136
R5F21256SNFP#U0
Manufacturer Part Number
R5F21256SNFP#U0
Description
IC R8C MCU FLASH 32K 52LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/25r
Datasheets
1.R5F211A2SPU0.pdf
(300 pages)
2.R5F21246SDFPU0.pdf
(61 pages)
3.R5F21246SDFPU0.pdf
(527 pages)
Specifications of R5F21256SNFP#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
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2K 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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
R5F21256SNFP#U0R5F21256SNFP#ES
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 12.14
Figure 12.15
12.2.2
INTi input
Sampling
timing
IR bit in
INTiIC register
The INTi input contains a digital filter. The sampling clock is selected by bits INTiF1 to INTiF0 in the INTF
register.
The INTi level is sampled every sampling clock cycle and if the sampled input level matches three times, the IR
bit in the INTiIC register is set to 1 (interrupt requested).
Figure 12.14 shows the Configuration of INTi Input Filter. Figure 12.15 shows an Operating Example of INTi
Input Filter.
Feb 29, 2008
Port direction
INTi Input Filter (i = 0 to 3)
register
This is an operation example when bits INTiF1 to INTiF0 in the
INTiF register are set to 01b, 10b, or 11b (digital filter enabled).
i = 0 to 3
Configuration of INTi Input Filter
Operating Example of INTi Input Filter
INTi
(1)
INTiF0, INTiF1: Bits in INTF register
INTiEN, INTiPL: Bits in INTEN register
i = 0 to 3
NOTE:
1. INT0: Port P4_5 direction register
f32
f1
f8
INT2: Port P6_6 direction register
INT1: Port P1_5 direction register when using the P1_5 pin
INT3: Port P6_7 direction register
INTiF1 to INTiF0
Page 117 of 485
= 01b
= 10b
= 11b
Port P1_7 direction register when using the P1_7 pin
Sampling clock
matches 3x)
Digital filter
(input level
Other than
INTiF1 to INTiF0
= 00b
INTiEN
= 00b
Both edges
detection
circuit
Set to 0 by a program
INTiPL = 0
INTiPL = 1
INTi interrupt
12. Interrupts
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