M30280F6HP#U5 Renesas Electronics America, M30280F6HP#U5 Datasheet - Page 275

• Manufacturer Part Number: M30280F6HP#U5
• Description: IC M16C MCU FLASH 48K 80LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/Tiny/28r

Specifications of M30280F6HP#U5

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IEBus, SIO, UART/USART
• Peripherals: DMA, POR, PWM, Voltage Detect, WDT
• Number Of I /o: 71
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 24x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 80-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Chapter 5
Figure 5.3.3 Operations to save registers
[SP]–5
(Odd address)
[SP]–4
(Even address)
[SP]–3
(Odd address)
[SP]–2
(Even address)
[SP]–1
(Odd address)
[SP]
(Even address)
The register save operation performed in an interrupt sequence differs depending on whether the con-
tent of the stack pointer (SP)
If the stack pointer (SP)
counter (PC) each are saved simultaneously all 16 bits together. If the stack pointer indicates an odd
number, the register contents each are saved in two operations 8 bits at a time. Figure 5.3.3 shows how
registers are saved in each case.
*1 Stack pointer indicated by the U flag.
(1) When stack pointer (SP) contains an even number
*
Address
[SP] denotes the initial value of the stack pointer (SP) when interrupt request is acknowledged.
After the microcomputer finishes saving registers, the SP content is [SP] minus 4.
Flag register
Program counter (PC
Program counter (PC
Flag register (FLG
Interrupt
(FLG
Stack area
H
)
Program counter
(PC
*1
L
)
H
indicates an even number, the contents of the flag register (FLG) and program
)
L
M
)
)
*1
Sequence in which order
registers are saved
Finished saving registers
in two operations.
is an even or an odd number when an interrupt request is acknowledged.
(1) Saved simul-
taneously, all 16
bits together
(2) Saved simul-
taneously, all 16
bits together
257
[SP]
(Odd address)
[SP]–5
(Even address)
[SP]–4
(Odd address)
[SP]–3
(Even address)
[SP]–2
(Odd address)
[SP]–1
(Even address)
(2) When stack pointer (SP) contains an odd number
Address
Program counter (PC
Program counter (PC
Flag register (FLG
Flag register
(FLG
Stack area
H
)
Program counter
(PC
L
)
H
)
L
M
)
)
Sequence in which order
registers are saved
Finished saving registers in
four operations.
5.3 Interrupt Sequence
(3)
(4)
(1)
(2)
Saved
separately, 8
bits at a time