M3087BFLBGP#U5 Renesas Electronics America, M3087BFLBGP#U5 Datasheet - Page 137

• Manufacturer Part Number: M3087BFLBGP#U5
• Description: IC M32C/87 MCU FLASH 144LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M32C/80r

Specifications of M3087BFLBGP#U5

• Core Processor: M32C/80
• Core Size: 16/32-Bit
• Speed: 32MHz
• Connectivity: EBI/EMI, I²C, IEBus, IrDA, SIO, UART/USART
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 121
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 34x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: R0K330879S001BE - KIT DEV RSK M32C/87R0K330879S000BE - KIT DEV RSK M32C/87
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

M32C/87 Group (M32C/87, M32C/87A, M32C/87B)
REJ09B0180-0151 Rev.1.51 Jul 31, 2008
Page 113 of 587
11.6
11.6.1
Table 11.4
11.6.2
Software interrupts occur when their corresponding instructions are executed. The INTO instruction, however,
requires the O flag in the FLG register to be 1. Special interrupts occur when their corresponding interrupt requests
are generated.
For the peripheral function interrupts to be acknowledged, the following conditions must be met:
The I flag, IPL, IR bit, and bits ILVL2 to ILVL0 are independent of each other. The I flag and IPL are in the FLG
register. The IR bit and bits ILVL2 to ILVL0 are in the Interrupt Control Register.
IPL2 to IPL0
•
•
•
The I flag enables and disables maskable interrupts. When the I flag is set to 1 (enable), all maskable interrupts
are enabled; when the I flag is set to 0 (disable), they are disabled. The I flag automatically becomes 0 after
reset.
IPL is 3 bits wide and indicates the Interrupt Priority Level (IPL) from level 0 to level 7. If a requested interrupt
has higher priority level than IPL, the interrupt is acknowledged.
Table 11.4 lists interrupt priority levels associated with IPL.
The Interrupt Control Registers are used to control the peripheral function interrupts. Figures 11.4 and 11.5
show the Interrupt Control Registers. Figure 11.6 shows the RLVL register.
I flag = 1
IR bit = 1
Bits ILVL2 to ILVL0 > IPL
Interrupt Request Acknowledgement
0
1
2
3
4
5
6
7
I Flag and IPL
Interrupt Control Registers and RLVL Register
Interrupt Priority Levels
Level 1 and above
Level 2 and above
Level 3 and above
Level 4 and above
Level 5 and above
Level 6 and above
Level 7 and above
All maskable interrupts are disabled
Required Interrupt Priority Levels to Be Acknowledged
for Maskable Interrupts
11. Interrupts