R5F2L3AAANFP#U1 Renesas Electronics America, R5F2L3AAANFP#U1 Datasheet - Page 217

• Manufacturer Part Number: R5F2L3AAANFP#U1
• Description: MCU FLASH 96+4KB 100LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/Lx/3AAr

Specifications of R5F2L3AAANFP#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: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K 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: 100-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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 180 of 802
11.8.5
(a) The contents of the interrupt control register can be rewritten only while no interrupt requests
(b) When rewriting the contents of the interrupt control register after disabling the interrupt, be careful to
(c) When using the I flag to disable an interrupt, set the I flag as shown in the sample programs below.
Examples 1 to 3 shows how to prevent the I flag from being set to 1 (interrupts enabled) before the contents of
the interrupt control register are rewritten for the effects of the internal bus and the instruction queue buffer.
Example 1:
Example 2:
Example 3:
INT_SWITCH1:
INT_SWITCH2:
INT_SWITCH3:
corresponding to that register are generated. If an interrupt request may be generated, disable the interrupt
before rewriting the contents of the interrupt control register.
choose appropriate instructions.
Changing any bit other than the IR bit
If an interrupt request corresponding to the register is generated while executing the instruction, the IR bit
may not be set to 1 (interrupt requested), and the interrupt may be ignored. If this causes a problem, use one
of the following instructions to rewrite the contents of the register:
AND, OR, BCLR, and BSET.
Changing the IR bit
Depending on the instruction used, the IR bit may not be set to 0 (no interrupt requested).
Use the MOV instruction to set the IR bit to 0.
Refer to (b) regarding rewriting the contents of interrupt control registers using the sample programs.
Rewriting Interrupt Control Register
FCLR
AND.B
NOP
NOP
FSET
FCLR
AND.B
MOV.W MEM,R0
FSET
PUSHC FLG
FCLR
AND.B
POPC
Use the NOP instructions to pause program until the interrupt control register is rewritten
Use a dummy read to delay the FSET instruction
Use the POPC instruction to change the I flag
I
I
I
#00H,0056H
I
#00H,0056H
I
#00H,0056H
FLG
Oct 30, 2009
; Disable interrupts
; Set the TRAIC register to 00h
;
; Enable interrupts
; Disable interrupts
; Set the TRAIC register to 00h
; Dummy read
; Enable interrupts
; Disable interrupts
; Set the TRAIC register to 00h
; Enable interrupts
11. Interrupts