DF2505BR26DV Renesas Electronics America, DF2505BR26DV Datasheet - Page 161

• Manufacturer Part Number: DF2505BR26DV
• Description: IC H8S/2505 MCU FLASH 176-LFBGA
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2505BR26DV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 26MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 104
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 176-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

The same also applies when an interrupt source flag is cleared to 0.
The above contention will not occur, if an enable bit or interrupt source flag is cleared to 0 while
the interrupt is masked.
Figure 5.9 shows an example in which the CMIEA bit in the TCR register of the 8-bit timer is
cleared to 0.
5.6.2
The instructions that disable interrupt requests directly after execution are LDC, ANDC, ORC,
and XORC. After any of these instructions are executed, all interrupts including NMI are disabled
and the next instruction is always executed.
When the I bit is set by one of these instructions, the new value becomes valid two states after
execution of the instruction ends.
5.6.3
There are times when interrupt acceptance is disabled by the interrupt controller.
Instructions That Disable Interrupts
When Interrupts Are Disabled
Internal
address bus
Internal
write signal
CMIEA
CMFA
CMIA
interrupt signal
Figure 5.9 Contention between Interrupt Generation and Disabling
φ
TCR write cycle by CPU
TCR address
Rev. 6.00 Sep. 24, 2009 Page 113 of 928
CMIA exception handling
Section 5 Interrupt Controller
REJ09B0099-0600