M30290FAHP#U5A Renesas Electronics America, M30290FAHP#U5A Datasheet - Page 107

• Manufacturer Part Number: M30290FAHP#U5A
• Description: IC M16C/29 MCU FLASH 96K 80LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/Tiny/29r

Specifications of M30290FAHP#U5A

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, I²C, IEBus, SIO, UART/USART
• Peripherals: DMA, POR, PWM, Voltage Detect, WDT
• Number Of I /o: 71
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 27x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 80-LQFP
• For Use With: R0K330290S000BE - KIT EVAL STARTER FOR M16C/29M30290T2-CPE - EMULATOR COMPACT M16C/26A/28/29M30290T2-CPE-HP - EMULATOR COMPACT FOR M16C/TINY
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R
R
M
e
E
1
. v
J
Figure 9.7 Stack Status Before and After Acceptance of Interrupt Request
6
0
9.4.3 Saving Registers
1
C
9
1 .
B
In the interrupt sequence, the FLG register and PC are saved to the stack.
At this time, the 4 high-order bits of the PC and the 4 high-order (IPL) and 8 low-order bits of the FLG
register, 16 bits in total, are saved to the stack first. Next, the 16 low-order bits of the PC are saved.
Figure 9.7 shows the stack status before and after an interrupt request is accepted.
The other necessary registers must be saved in a program at the beginning of the interrupt routine. Use
the PUSHM instruction, and all registers except SP can be saved with a single instruction.
2 /
0
2
9
1
Address
M
0
G
1
r a
m – 4
m – 3
m – 2
m – 1
m
m + 1
Stack status before interrupt request
is acknowledged
0 -
o r
3 .
1
MSB
u
, 0
1
p
2
2
Content of previous stack
Content of previous stack
0
0
7
Stack
page 81
f o
LSB
4
5
8
[SP]
SP value before
interrupt request is
accepted.
Address
m – 4
m – 3
m – 2
m – 1
m
m + 1
Stack status after interrupt request
is acknowledged
MSB
Content of previous stack
Content of previous stack
FLG
H
Stack
PC
PC
FLG
M
L
L
PC
H
LSB
[SP]
New SP value