R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 194

• Manufacturer Part Number: R5F21346CNFP#U0
• Description: MCU 1KB FLASH 32K ROM 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/34Cr

Specifications of R5F21346CNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 43
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/34C Group
REJ09B0586-0100 Rev.1.00 Jan 13, 2010
Page 161 of 723
Figure 11.6
The register saving operation, which is performed as part of the interrupt sequence, saved in 8 bits at a time in
four steps.
Figure 11.6 shows the Register Saving Operation.
Address
Note:
[SP]−5
[SP]−4
[SP]−3
[SP]−2
[SP]−1
1.[SP] indicates the SP initial value when an interrupt request is acknowledged.
[SP]
Register Saving Operation
After registers are saved, the SP content is [SP] minus 4.
When an INT instruction for software numbers 32 to 63 has been executed,
this SP is indicated by the U flag. Otherwise it is ISP.
FLGH
Stack
PCM
FLGL
PCL
PCH
Sequence in which registers are saved
Completed saving registers
in four operations
(3)
(4)
(1)
(2)
Saved, 8 bits at a time
PCL
PCM
PCH
FLGL
FLGH
: 8 low-order bits of PC
: 8 middle-order bits of PC
: 4 high-order bits of PC
: 8 low-order bits of FLG
: 4 high-order bits of FLG
11. Interrupts