R5F2L3A7ANFP#U1 Renesas Electronics America, R5F2L3A7ANFP#U1 Datasheet - Page 807
R5F2L3A7ANFP#U1
Manufacturer Part Number
R5F2L3A7ANFP#U1
Description
MCU FLASH 48+4KB 64LQFP
Manufacturer
Renesas Electronics America
Series
R8C/Lx/3AAr
Datasheet
1.R5F2L387ANFPU1.pdf
(864 pages)
Specifications of R5F2L3A7ANFP#U1
Core Processor
R8C
Core Size
16/32-Bit
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
LCD, POR, PWM, Voltage Detect, WDT
Number Of I /o
88
Program Memory Size
48KB (48K x 8)
Program Memory Type
FLASH
Ram Size
6K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 20x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group,
R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group
REJ09B0441-0100 Rev.1.00
Page 770 of 802
35.11.4 Time Reading Procedure in Real-Time Clock Mode
In real-time clock mode, read registers TRESEC, TREMIN, TREHR, and TREWK when time data is updated
and read the PM bit in the TRECR1 register when the BSY bit is set to 0 (data is not being updated).
When reading several registers, an incorrect time will be read if data is updated before another register is read
after reading any register.
In order to prevent this, use the reading procedure shown below.
•
•
•
(1) Monitor the BSY bit.
(2) Monitor until the BSY bit is set to 0 after the BSY bit is set to 1 (approximately 62.5 ms while the BSY bit
(3) Read necessary contents of registers TRESEC, TREMIN, TREHR, and TREWK and the PM bit in the
•
(1) Read necessary contents of registers TRESEC, TREMIN, TREHR, and TREWK and the PM bit in the
(2) Read the same register as (1) and compare the contents.
(3) Recognize as the correct value if the contents match. If the contents do not match, repeat until the read
Using an interrupt
Read necessary contents of registers TRESEC, TREMIN, TREHR, and TREWK and the PM bit in the
TRECR1 register in the timer RE interrupt routine.
Monitoring with a program 1
Monitor the IR bit in the TREIC register with a program and read necessary contents of registers TRESEC,
TREMIN, TREHR, and TREWK and the PM bit in the TRECR1 register after the IR bit in the TREIC register
is set to 1 (timer RE interrupt request generated).
Monitoring with a program 2
Using read results if they are the same value twice
Also, when reading several registers, read them as continuously as possible.
is set to 1).
TRECR1 register after the BSY bit is set to 0.
TRECR1 register.
contents match with the previous contents.
Oct 30, 2009
35. Usage Notes
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