R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 163

MCU 1KB FLASH 16K ROM 20-LSSOP

R5F21324CNSP#U0

Manufacturer Part Number
R5F21324CNSP#U0
Description
MCU 1KB FLASH 16K ROM 20-LSSOP
Manufacturer
Renesas Electronics America
Series
R8C/3x/32Cr
Datasheet

Specifications of R5F21324CNSP#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
15
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
20-LSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
R8C/32C Group
REJ09B0573-0100 Rev.1.00 Dec. 18, 2009
Page 134 of 573
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

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