R5F21102DFP#U0 Renesas Electronics America, R5F21102DFP#U0 Datasheet - Page 55
R5F21102DFP#U0
Manufacturer Part Number
R5F21102DFP#U0
Description
IC R8C MCU FLASH 8K 32LQFP
Manufacturer
Renesas Electronics America
Series
M16C™ M16C/R8C/Tiny/10r
Datasheets
1.R5F211A2SPU0.pdf
(300 pages)
2.R5F21102FPU0.pdf
(30 pages)
3.R5F21102FPU0.pdf
(201 pages)
Specifications of R5F21102DFP#U0
Core Processor
R8C
Core Size
16-Bit
Speed
16MHz
Connectivity
SIO, UART/USART
Peripherals
LED, WDT
Number Of I /o
22
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
For Use With
R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521134EPB00 - KIT EMULATOR PROBE FOR PC7501R0E521134CPE00 - EMULATOR COMPACT R8C/13
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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R8C/10 Group
Rev.1.20 Jan 27, 2006
REJ09B0019-0120
Figure 10.6 Stack Status Before and After Acceptance of Interrupt Request
Figure 10.7 Operation of Saving Register
The registers are saved in four steps, 8 bits at a time. Figure 10.7 shows the operation of the saving
registers.
NOTES:
1. When any INT instruction in software numbers 32 to 63 has been executed, this is the SP indi-
• Saving Registers
In the interrupt sequence, the FLG register and PC are saved to the stack.
At this time, the 4 high-order bits in the PC and the 4 high-order (IPL) and 8 low-order bits in the FLG
register, 16 bits in total, are saved to the stack first. Next, the 16 low-order bits in the PC are saved.
Figure 10.6 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.
The PUSHM instruction can save several registers in the register bank being currently used
a single instruction.
NOTES:
cated by the U flag. Otherwise, it is the ISP.
Address
1. Selectable from registers R0, R1, R2, R3, A0, A1, SB, and FB.
m – 4
m – 3
m – 2
m – 1
m
m + 1
Stack status before interrupt request
is acknowledged
MSB
Content of previous stack
Content of previous stack
page 43 of 180
Stack
A d d r e s s
[ S P ] – 5
[ S P ] – 4
[ S P ] – 3
[ S P ] – 2
[ S P ] – 1
[ S P ]
N O T E S :
1 . [ S P ] d e n o t e s t h e i n i t i a l v a l u e o f t h e S P w h e n i n t e r r u p t r e q u e s t i s a c k n o w l e d g e d .
A f t e r r e g i s t e r s a r e s a v e d , t h e S P c o n t e n t i s [ S P ] m i n u s 4 .
LSB
[SP]
SPvalue before
interrupt occurs
FLG
H
Stack
FLG
PC
PC
M
L
L
PC
H
Address
m – 4
m – 3
m – 2
m – 1
m
m + 1
Stack status after interrupt request
is acknowledged
MSB
Sequence in which order
registers are saved
( 3 )
( 4 )
( 1 )
( 2 )
F i n i s h e d s a v i n g r e g i s t e r s
i n f o u r o p e r a t i o n s .
Content of previous stack
Content of previous stack
FLG
S a v e d , 8 b i t s a t a t i m e
H
Stack
PC
PC
FLG
L
M
L
PC
H
10.1 Interrupt Overview
LSB
[SP]
New SP value
(1)
with
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