DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 150

• Manufacturer Part Number: DF2345TE20
• Description: MCU 5V 128K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2345TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2345TE20; HD64F2345TE20

Section 5 Interrupt Controller
Table 5.10 Number of States in Interrupt Handling Routine Execution Statuses
Symbol
Instruction fetch
Branch address read
Stack manipulation
Legend:
m: Number of wait states in an external device access.
5.5
5.5.1
When an interrupt enable bit is cleared to 0 to disable interrupts, the disabling becomes effective
after execution of the instruction.
In other words, when an interrupt enable bit is cleared to 0 by an instruction such as BCLR or
MOV, if an interrupt is generated during execution of the instruction, the interrupt concerned will
still be enabled on completion of the instruction, and so interrupt exception handling for that
interrupt will be executed on completion of the instruction. However, if there is an interrupt
request of higher priority than that interrupt, interrupt exception handling will be executed for the
higher-priority interrupt, and the lower-priority interrupt will be ignored.
The same also applies when an interrupt source flag is cleared.
Figure 5.8 shows and example in which the CMIEA bit in 8-bit timer TCR is cleared to 0.
Rev. 4.00 Feb 15, 2006 page 124 of 900
REJ09B0291-0400
Usage Notes
Contention between Interrupt Generation and Disabling
S
S
S
I
J
K
Internal
Memory
1
2-State
Access
4
8-Bit Bus
Object of Access
3-State
Access
6+2m
External Device
2-State
Access
2
16-Bit Bus
3-State
Access
3+m