UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 217

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

12.1 Interrupt Function Types
12.2 Interrupt Sources and Configuration
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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 U16898EJ5V0UD
The causes for reset signal
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