UPD78F0535GB(T)-UEU-A NEC, UPD78F0535GB(T)-UEU-A Datasheet - Page 514
UPD78F0535GB(T)-UEU-A
Manufacturer Part Number
UPD78F0535GB(T)-UEU-A
Description
8BIT MCU, 60K FLASH, 3KB RAM, LQFP
Manufacturer
NEC
Datasheet
1.UPD78F0535GBT-UEU-A.pdf
(773 pages)
Specifications of UPD78F0535GB(T)-UEU-A
Controller Family/series
UPD78
No. Of I/o's
55
Ram Memory Size
3KB
Cpu Speed
20MHz
No. Of Timers
8
No. Of Pwm
RoHS Compliant
Core Size
8bit
Program Memory Size
60KB
Oscillator Type
External, Internal
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19.4.4 Interrupt request hold
executed, request acknowledgement is held pending until the end of execution of the next instruction.
instructions (interrupt request hold instructions) are listed below.
514
CPU processing
There are instructions where, even if an interrupt request is issued for them while another instruction is being
• MOV PSW, #byte
• MOV A, PSW
• MOV PSW, A
• MOV1 PSW. bit, CY
• MOV1 CY, PSW. bit
• AND1 CY, PSW. bit
• OR1 CY, PSW. bit
• XOR1 CY, PSW. bit
• SET1 PSW. bit
• CLR1 PSW. bit
• RETB
• RETI
• PUSH PSW
• POP PSW
• BT PSW. bit, $addr16
• BF PSW. bit, $addr16
• BTCLR PSW. bit, $addr16
• EI
• DI
• Manipulation instructions for the IF0L, IF0H, IF1L, IF1H, MK0L, MK0H, MK1L, MK1H, PR0L, PR0H, PR1L, and
Caution The BRK instruction is not one of the above-listed interrupt request hold instructions. However,
Figure 19-11 shows the timing at which interrupt requests are held pending.
Remarks 1. Instruction N: Interrupt request hold instruction
PR1H registers.
××IF
the software interrupt activated by executing the BRK instruction causes the IE flag to be cleared.
Therefore, even if a maskable interrupt request is generated during execution of the BRK
instruction, the interrupt request is not acknowledged.
2. Instruction M: Instruction other than interrupt request hold instruction
3. The ××PR (priority level) values do not affect the operation of ××IF (interrupt request).
Instruction N
Figure 19-11. Interrupt Request Hold
CHAPTER 19 INTERRUPT FUNCTIONS
User’s Manual U17260EJ6V0UD
Instruction M
PSW and PC saved, jump
to interrupt servicing
Interrupt servicing
program
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