UPD78F9221CS-CAC-A Renesas Electronics America, UPD78F9221CS-CAC-A Datasheet - Page 222
UPD78F9221CS-CAC-A
Manufacturer Part Number
UPD78F9221CS-CAC-A
Description
MCU 8BIT 2KB FLASH 20PIN
Manufacturer
Renesas Electronics America
Series
78K0S/Kx1+r
Datasheet
1.UPD78F9221MC-5A4-A.pdf
(418 pages)
Specifications of UPD78F9221CS-CAC-A
Core Processor
78K0S
Core Size
8-Bit
Speed
10MHz
Connectivity
LIN, UART/USART
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
15
Program Memory Size
2KB (2K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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12.1 Interrupt Function Types
12.2 Interrupt Sources and Configuration
220
There are two types of interrupts: maskable interrupts and resets.
There are a total of 13 maskable interrupt sources, and up to four reset sources (see Table 12-1).
Maskable interrupts
These interrupts undergo mask control. When an interrupt request occurs, the standby release signal occurs,
and if an interrupt can be acknowledged then the program corresponding to the address written in the vector
table address is executed (vector interrupt servicing). When several interrupt requests are generated at the
same time, processing takes place in the priority order of the vector interrupt servicing. For details on the
priority order, see Table 12-1.
There are nine internal sources and four external sources of maskable interrupts.
Reset
The CPU and SFR are returned to their initial states by the reset signal.
occurrences are shown in Table 12-1.
When a reset signal occurs, program execution starts from the programs at the addresses written in addresses
0000H and 0001H.
CHAPTER 12 INTERRUPT FUNCTIONS
User’s Manual U16898EJ6V0UD
The causes for reset signal
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